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MCQOPTIONS
This section includes 1777 Mcqs, each offering curated multiple-choice questions to sharpen your 9th Class knowledge and support exam preparation. Choose a topic below to get started.
| 1351. |
What weight of sodium contains the same number of atoms as those in \[8\] grams of oxygen? |
| A. | \[10.5\,\,g\] |
| B. | \[13.5\,\,g\] |
| C. | \[11.5\,\,g\] |
| D. | \[14.2\,\,g\] |
| Answer» D. \[14.2\,\,g\] | |
| 1352. |
Rutherford's experiment which established the nuclear model of the atom used a beam of |
| A. | \[\beta \]- particles which impinged on a metal foil and got absorbed |
| B. | \[\gamma \]- rays which impinged on a metal foil and ejected electrons |
| C. | Helium atoms, which impinged on a metal foil and got scattered |
| D. | Helium nuclei, which impinged on a metal foil and got scattered |
| Answer» E. | |
| 1353. |
Which is not true with respect to cathode rays? |
| A. | A stream of electrons |
| B. | Charged particles |
| C. | Move with same speed as that of light |
| D. | Can be deflected by magnetic fields |
| E. | Can be deflected by electric fields |
| Answer» D. Can be deflected by magnetic fields | |
| 1354. |
Which of these are parts of the protoplasm? |
| A. | Cell membrane and cytoplasm |
| B. | Chloroplast and cell wall |
| C. | Cytoplasm and nucleus |
| D. | Vacuole and cytoplasm |
| Answer» D. Vacuole and cytoplasm | |
| 1355. |
These are membrane bound vacuolar organelles discovered by de Duve. They mostly occur in animal cells but they have also been reported in plant cells. They are concerned with the waste disposal system of the cell.The cell organelles being referred in the above passage are |
| A. | Mitochondria |
| B. | Golgi bodies |
| C. | Peroxisomes |
| D. | Lysosomes. |
| Answer» E. | |
| 1356. |
Calculate the weight in grams of \[0.75\] gram moles of\[NaHC{{O}_{3}}\]. |
| A. | \[64\,\,g\] |
| B. | \[63\,\,g\] |
| C. | \[65\,\,g\] |
| D. | \[66\,\,g\] |
| Answer» C. \[65\,\,g\] | |
| 1357. |
Take a clean glass slide and put few drops of water on it. Now place a complete Rheo leaf on water droplets and examine the cells of leaf under the high power of compound microscope. Put a few drops of concentrated salt/sugar solution on the mounted Rheo leaf on the glass slide. Wait for few minutes and again observe the leaf under the high power of microscope.What will be your observation after few minutes? |
| A. | Cell contents are separated from the cell wall. |
| B. | Cytoplasm along with plasma membrane has come to lie on one side of cell wall. |
| C. | A clear space is seen between the cell wall and protoplast of the cells. |
| D. | All of these |
| Answer» E. | |
| 1358. |
An element M has an atomic mass 19 and atomic number 9; its ions are represented by |
| A. | \[{{\text{M}}^{+}}\] |
| B. | \[{{\text{M}}^{2+}}\] |
| C. | \[{{\text{M}}^{-}}\] |
| D. | \[{{\text{M}}^{\text{2}-}}\] |
| Answer» B. \[{{\text{M}}^{2+}}\] | |
| 1359. |
How many grams of \[N{{a}_{2}}C{{O}_{3}}\] weighed to get \[0.1\] mole\[N{{a}_{2}}C{{O}_{3}}\]? |
| A. | \[10\,\,g\] |
| B. | \[5\,\,g\] |
| C. | \[10.6\,\,g\] |
| D. | \[12.6\,\,g\] |
| Answer» D. \[12.6\,\,g\] | |
| 1360. |
My Identify the pair of substances having the same formula unit mass. |
| A. | Calcium chloride, potassium carbonate |
| B. | Calcium oxide, hydrochloric acid |
| C. | Carbon monoxide, ammonia |
| D. | Carbon dioxide, nitrous oxide |
| Answer» E. | |
| 1361. |
Which labelled part magnifies the object under examination? |
| A. | Only P |
| B. | Only Q |
| C. | Only P and Q |
| D. | Only R and S |
| Answer» C. Only P and Q | |
| 1362. |
Which of the following atoms has no neutron in its nucleus? |
| A. | Helium |
| B. | Lithium |
| C. | Protium |
| D. | Tritium |
| Answer» C. Protium | |
| 1363. |
Which of the following organelles is may responsible for mechanical support and enzyme transport? |
| A. | Mitochondria |
| B. | Endoplasmic Reticulum |
| C. | Chloroplast |
| D. | Golgi-complex |
| Answer» C. Chloroplast | |
| 1364. |
All members of the Gupta family can roll their tongues. Which of the parts labelled in the given figure carries information regarding this characteristic? |
| A. | P |
| B. | Q |
| C. | R |
| D. | S |
| Answer» C. R | |
| 1365. |
Calculate the number of atoms of sulphur present in \[0.5\] moles of. |
| A. | \[62.02\times {{10}^{23}}\]atoms |
| B. | \[622\times {{10}^{23}}\]atoms |
| C. | \[6.023\times {{10}^{23}}\]atoms |
| D. | \[6.02\times {{10}^{-23}}\]atoms |
| Answer» D. \[6.02\times {{10}^{-23}}\]atoms | |
| 1366. |
Which cell organelles is/are absent in an animal cell ? |
| A. | A nucleus |
| B. | A cell wall |
| C. | A large vacuole |
| D. | Both [b] and [c] |
| Answer» E. | |
| 1367. |
How many gram atoms and atoms are there in \[10\] grams of calcium? |
| A. | \[0.25\] gram atoms, \[6.023\times {{10}^{-23}}\] atoms |
| B. | \[0.25\] gram atoms, \[1.50\times {{10}^{-23}}\] atoms |
| C. | \[0.1\] gram atoms, \[6.023\times {{10}^{23}}\] atoms |
| D. | \[0.1\] gram atoms, \[1.50\times {{10}^{23}}\] atoms |
| Answer» C. \[0.1\] gram atoms, \[6.023\times {{10}^{23}}\] atoms | |
| 1368. |
Which of the following structures helps you to determine that it is not an animal cell? |
| A. | Cell wall and vacuole |
| B. | Mitochondria and Ribosome |
| C. | Ribosomes and lysosomes |
| D. | Plasma membrane |
| Answer» B. Mitochondria and Ribosome | |
| 1369. |
Calculate the number of moles of zinc in\[23.3\,\,g\]. |
| A. | \[0.37\]moles |
| B. | \[0.36\]moles |
| C. | \[0.5\]moles |
| D. | \[0.53\]moles |
| Answer» C. \[0.5\]moles | |
| 1370. |
Two flasks I and II contain oxygen \[\text{(}{{\text{O}}_{\text{2}}}\text{)}\]and ozone \[\text{(}{{\text{O}}_{3}}\text{)}\] respectively. Flask I contains 0.5 mole of oxygen while flask II contains 0.4 mole of ozone. Which of the two flasks have greater number of oxygen atoms? |
| A. | Flask II containing ozone has greater number of oxygen atoms as compared to flask I. |
| B. | Flask I containing oxygen has greater number of oxygen atoms as compared to flask II. |
| C. | Both flasks I and II have same number of oxygen atoms. |
| D. | Number of atoms of oxygen cannot be calculated from the available data. |
| Answer» B. Flask I containing oxygen has greater number of oxygen atoms as compared to flask II. | |
| 1371. |
The mass of the neutron is of the order of. |
| A. | \[\text{1}{{0}^{-\text{23}}}\text{ kg}\] |
| B. | \[\text{1}{{0}^{-\text{24}}}\text{ kg}\] |
| C. | \[\text{1}{{0}^{-\text{26}}}\text{ kg}\] |
| D. | \[\text{1}{{0}^{-\text{27}}}\text{ kg}\] |
| Answer» E. | |
| 1372. |
Fill in the blanks by selecting the option with correct sequence of words.The symbolic representation of a molecule showing actual number of various atoms present in it is called its ___X___ formula. The number of atoms of all elements present in a molecule is known as its ___Y___ .___Z___ formula gives the simplest ratio of atoms present in one molecule of the compound. |
| A. | XYZChemicalValencyMolecular |
| B. | XYZMolecularValencyChemical |
| C. | XYZEmpiricalAtomicityMolecular |
| D. | XYZMolecularAtomicityEmpirical |
| Answer» E. | |
| 1373. |
Which cell organelle reduces the number of other organelles? |
| A. | Endoplasmic reticulum |
| B. | Mitochondria |
| C. | Lysosome |
| D. | Ribosome |
| Answer» D. Ribosome | |
| 1374. |
How much lime is obtained by burning \[400\,\,g\] of lime stone? |
| A. | \[224\,\,g\] |
| B. | \[220\,\,g\] |
| C. | \[400\,\,g\] |
| D. | \[320\,\,g\] |
| Answer» B. \[220\,\,g\] | |
| 1375. |
180 g of water can be represented as(i) 5 g mole of water(ii) 10 moles of water(iii) \[\text{6}\text{.023}\times {{10}^{23}}\] molecules of water(iv) \[\text{6}\text{.023}\times \text{1}{{\text{0}}^{\text{24}}}\] molecules of water. |
| A. | (i) and (ii) only |
| B. | (ii) and (iv) only |
| C. | (ii) and (iii) only |
| D. | All of these. |
| Answer» C. (ii) and (iii) only | |
| 1376. |
Identify the parts labelled \[P,\,\,Q\] and \[R\] in the diagram of a root hair cell, shown below. |
| A. | P-Vacuole, Q-Nucleus, R-Cell wall. |
| B. | P-Protoplasm, Q-Nucleus, R-Cell membrane. |
| C. | P-Nucleus, Q-Vacuole, R-Cell wall. |
| D. | P-Mitochondria, Q-Nucleus, R-Cell wall. |
| Answer» D. P-Mitochondria, Q-Nucleus, R-Cell wall. | |
| 1377. |
Which is the correct statement about proton? |
| A. | proton is nucleus of deuterium |
| B. | proton is a particle |
| C. | proton is ionized hydrogen molecule |
| D. | proton is ionized hydrogen atom |
| Answer» E. | |
| 1378. |
What would happen if 'nucleus' is removed from the cell? |
| A. | The activities of the cell will not be controlled. |
| B. | The cell will not have a regular shape. |
| C. | The cell will not be able to store food and water. |
| D. | The movement of substances in and out of the cell will not be controlled. |
| Answer» B. The cell will not have a regular shape. | |
| 1379. |
The value of Planck's constant is |
| A. | \[\text{6}.\text{6256}\times \text{1}{{0}^{-\text{27}}}\text{erg sec}\] |
| B. | \[\text{66}.\text{256}\times \text{1}{{0}^{-\text{27}}}\text{ erg sec}\] |
| C. | \[\text{6}.0\text{2}\times \text{1}{{0}^{-\text{15}}}\text{ erg sec}\] |
| D. | \[\text{3}.0\text{1}\times \text{l}{{0}^{-\text{23}}}\text{ erg sec}\] |
| Answer» B. \[\text{66}.\text{256}\times \text{1}{{0}^{-\text{27}}}\text{ erg sec}\] | |
| 1380. |
Calculate the weight of \[3.0\] moles of\[KCl{{O}_{3}}\]. |
| A. | \[245\,\,g\] |
| B. | \[249\,\,g\] |
| C. | \[367.5\,\,g\] |
| D. | \[24.5\,\,g\] |
| Answer» D. \[24.5\,\,g\] | |
| 1381. |
Number of electrons in the outermost orbit of the element of atomic number 15 is |
| A. | 7 |
| B. | 5 |
| C. | 3 |
| D. | 2 |
| Answer» C. 3 | |
| 1382. |
Calculate the number of moles present in \[4.9\,\,g\] of\[4.9\,\,g\]of\[{{H}_{2}}S{{O}_{4}}\]. |
| A. | \[0.01\] moles |
| B. | \[0.02\] moles |
| C. | \[0.05\] moles |
| D. | \[0.03\] moles |
| Answer» D. \[0.03\] moles | |
| 1383. |
The given cell is found in which organ system? |
| A. | Digestive system |
| B. | Reproductive system |
| C. | Circulatory system |
| D. | Respiratory system |
| Answer» C. Circulatory system | |
| 1384. |
How many moles of oxygen atoms are present in one mole of acetic acid? |
| A. | \[1\] mole |
| B. | \[3\] moles |
| C. | \[2\] moles |
| D. | \[6\] moles |
| Answer» D. \[6\] moles | |
| 1385. |
Calculate the weight of \[0.8\] moles of magnesium. |
| A. | \[20\,\,g\] |
| B. | \[30\,\,g\] |
| C. | \[19.2\,\,g\] |
| D. | \[31.2\,\,g\] |
| Answer» C. \[19.2\,\,g\] | |
| 1386. |
'Ca' has atomic number 20 and atomic weight 40. Which of the following statements is not correct about 'Ca' atom? |
| A. | The number of electrons is same as the number of neutrons |
| B. | The number of nucleons is double the number of neutrons |
| C. | The number of protons is half the number of neutrons |
| D. | The number of nucleons is double the atomic number |
| Answer» D. The number of nucleons is double the atomic number | |
| 1387. |
The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is |
| A. | 2 |
| B. | 17 |
| C. | 37 |
| D. | 38 |
| Answer» E. | |
| 1388. |
Which pair is isoelectronic? |
| A. | Ar and \[Cl\] |
| B. | \[\text{N}{{\text{a}}^{+}}\] and Ne |
| C. | \[\text{N}{{\text{a}}^{+}}\] and Mg |
| D. | Mg and Ne |
| Answer» C. \[\text{N}{{\text{a}}^{+}}\] and Mg | |
| 1389. |
How many gram atoms and number of atoms are present in \[20\,\,g\] of calcium? |
| A. | \[0.05\] gram atoms and \[3.1\times {{10}^{23}}\]atoms |
| B. | \[0.5\] gram atoms and \[3.01\times {{10}^{23}}\]atoms |
| C. | \[0.5\]gram atoms and \[3.1\times {{10}^{23}}\]atoms |
| D. | \[0.2\] gram atoms and \[3.1\times {{10}^{23}}\]atoms |
| Answer» C. \[0.5\]gram atoms and \[3.1\times {{10}^{23}}\]atoms | |
| 1390. |
Which cell organelle carries the functions of mechanical support, enzyme circulation, Protein synthesis and detoxification of drugs? |
| A. | Chromoplast |
| B. | Chloroplast |
| C. | Mitochondria |
| D. | Endoplasmic reticulum |
| Answer» E. | |
| 1391. |
Calculate the mass of one molecule of\[{{H}_{2}}O\]. |
| A. | \[29.88\times {{10}^{23}}g\] |
| B. | \[2.988\times {{10}^{23}}g\] |
| C. | \[0.2988\times {{10}^{23}}g\] |
| D. | \[2.988\times {{10}^{-23}}g\] |
| Answer» E. | |
| 1392. |
As we move away from nucleus, the energy of orbit |
| A. | decreases |
| B. | increases |
| C. | remains unchanged |
| D. | none of these |
| Answer» C. remains unchanged | |
| 1393. |
Companion cells are a part of: |
| A. | Xylem |
| B. | Phloem |
| C. | Cork |
| D. | Epidermis |
| E. | None of these |
| Answer» C. Cork | |
| 1394. |
What will be the weight of \[0.1\] mole of \[CaC{{O}_{3}}\]in grams? |
| A. | \[11\,\,g\] |
| B. | \[12\,\,g\] |
| C. | \[3\,\,g\] |
| D. | \[10\,\,g\] |
| Answer» E. | |
| 1395. |
Which part of the cell stores nutrients? |
| A. | Mitochondria |
| B. | Vacuole |
| C. | Ribosome |
| D. | Oxysome |
| Answer» C. Ribosome | |
| 1396. |
Calculate the number of grams present in \[0.5\] moles of acetylene. |
| A. | \[13\,\,g\] |
| B. | \[14\,\,g\] |
| C. | \[16\,\,g\] |
| D. | \[13.5\,\,g\] |
| Answer» B. \[14\,\,g\] | |
| 1397. |
Which of the following element's gram weight is \[6\,\,g\]for \[0.25\] moles of that element? |
| A. | Chlorine |
| B. | Magnesium |
| C. | Boron |
| D. | Carbon |
| Answer» C. Boron | |
| 1398. |
Identify the organism that contains nerve cell. |
| A. | Yeast |
| B. | Spirogyra |
| C. | Earthworm |
| D. | Amoeba |
| Answer» D. Amoeba | |
| 1399. |
\[N{{a}^{+}}\]ion is isoelectronic with |
| A. | \[L{{i}^{+}}\] |
| B. | \[M{{g}^{+2}}\] |
| C. | \[C{{a}^{2+}}\] |
| D. | \[B{{a}^{2+}}\] |
| Answer» C. \[C{{a}^{2+}}\] | |
| 1400. |
What is the function of the Chloroplast? |
| A. | To absorb carbon dioxide during photosynthesis |
| B. | To break up water into hydrogen and oxygen during photosynthesis |
| C. | To absorb food |
| D. | To form protein and amino acids in the presence of sunlight |
| Answer» C. To absorb food | |