00:06Question number 1 is the branch of chemistry that deals with the carbon compounds A. Inorganic
00:16B. Organic C. Physical D. Analytical The correct option will be B. Organic.
00:26Question number 2 is the molar mass of ammonia is A. 17 gram B. 17 amu C. 14 gram D.
00:4014 amu
00:41The correct option is A. 17 grams
00:47Question number 3 is formula mass of KCLO3 is A. 122.5 amu B. 12.25 amu C. 122 amu
01:03D. 123 amu
01:06The correct option is A. 122.5 amu
01:15Question number 4 is 44 amu of carbon dioxide CO2 is equal to A. Molar mass B. Atomic mass C.
01:26Molecular mass D. Mass number
01:29The correct option is C. Molecular mass
01:35Question number 5 is according to the Rutherford's model an atom consisted on dash parts A. 2 B. 3 C.
01:484 D. 1
01:49The correct option is A. 1912 B. 1911 C. 1923 D. 1930 The correct option will be B. 1911
02:17C. 975 amu C. 116 amu B. 1911 C. 1933 amu C. 1922 amu C. 1923 amu D. 1933 amu
02:19B. 1911 amu A. 1911 amu C. 1923 amu B. 1911 amu C. 1923 amu
02:19According to Neil Bohr, the maximum number of electrons in M shell is A2, B8, C18, D32.
02:31The correct option is C18.
02:35Question number 8 is, the number of elements in 4th period is A2, B8, C18, D32.
02:45The correct option is C18.
02:49Question number 9 is, radium is A, metal, B, metalloid, C, radioactive, D, non-metal.
03:00The correct option is C, radioactive.
03:05Question number 10 is, atomic radius of Mg, magnesium, is A, 1.97 angstrom, B, 1.36 angstrom,
03:20C, 2.15 angstrom, D, 1.12 angstrom.
03:27The correct option is, B, 1.36 angstrom.
03:32Question number 11 is, incomplete period of the periodic table is, A1, B3, C6, D7.
03:48Question number 12 is, the most reactive element is, A, sodium, B, copper, C, iron, D, calcium.
04:00Here the correct option will be, A, sodium, but the most reactive element among all is, cesium.
04:13Question number 13 is, the bond in MgO is, A, electrovalent bond, B, covalent bond, C,
04:21D, dative bond, D, metallic bond, the correct option will be, A, electrovalent bond, and the
04:30bond in MgO is also, ionic bond.
04:36Question number 14 is, the spreading of a substance through medium, like air or liquid,
04:44is called, A, diffusion, B, spreading, C, none of these, D, movement, the correct option will
04:52be, A, diffusion.
04:56Question number 15 is, the solubility of gas, dashed with rise in temperature, A, increase,
05:06B, decrease, C, stable, D, none of these, decrease is with the rise in temperature, so the correct
05:16option will be, B, decrease, but it increases with the increasing of pressure.
05:27Question number 16 is, basic unit of current is, A, ampere, B, coulomb, C, faraday, D, volt.
05:34The correct option is, A, ampere.
05:39Question number 17 is, the compounds which conducts electricity in molten condition is called,
05:47A, electrolytes, B, nonelectrolytes, C, metals, D, nonmetals.
05:53The correct option is, A, electrolytes.
05:56Question number 18 is, acids react with carbonates to produce, A, carbon dioxide, B, hydrogen,
06:04oxygen, C, CO, means carbon monoxide, D, oxygen.
06:10The correct option is, A, carbon dioxide, means CO2.
06:18Question number 19 is, which type salt, NaHSO4 is?
06:24A, normal, B, acidic, C, basic, D, double salt.
06:30The correct option will be, B, acidic.
06:35Question number 20 is, 5 moles of H2O are equal to,
06:42A, 80 grams, B, 90 grams, C, 100 grams, D, 90 AMU.
06:50The correct option is, B, 90 grams.
06:55Question number 21 is, the pH of tomato juice is, A, 4.2, B, 2.4, C, 2.8, D,
07:068.2.
07:06The correct option is, A, 4.2.
07:11Question number 22 is, law of constant composition is initiated by, A, Einstein, B, Lewis Proust,
07:23C, John Dalton, D, Lewis.
07:26The correct option will be, B, Lewis Proust.
07:32Question number 23 is, atomic number of calcium, C, A, is, A, 20, B, 30, C, 19, D, 5.
07:42The correct option is, A, 20.
07:46Because calcium is, 20 number in, periodic table.
07:52Question number 24 is, mass number of, zinc, means Zn, is,
07:58A, 65.39, B, 3.9, C, 39.65, D, 40.
08:06The correct option will be, A, 65.39.
08:13Question number 25 is, one mole of calcium carbonate is equal to,
08:19A, 160 grams, B, 100 grams, C, 105 grams, D, 110 grams.
08:26The correct option is, B, 100 grams.
08:32Question number 26 is, a change which alters the composition of a substance is called,
08:39A, chemical change, B, physical change, C, equation, D, formula.
08:45The correct option is, A, chemical change.
08:50Question number 27 is, a formula that indicates, actual number of atoms, in a molecule is called,
08:59A, empirical formula, B, molecular formula, C, molecular mass, D, formula mass.
09:07The correct option is, B, molecular formula.
09:12Question number 28 is, sodium chloride, NaCl, is, N, dash compound, A, ionic, B, covalent, C, dative, D, acidic.
09:24The correct option is, A, ionic.
09:29Question number 29 is, dash are the good conductors of the electricity, A, nonmetals, B, metals, C, metalloids, D, salts.
09:42The correct option is, B, metals.
09:46Metals are the good conductors of the electricity.
09:49Question number 30 is, the rule of triad was introduced by, A, mandeliev, B, dobernier, C, boher, D, lothermeyer.
10:01The correct option is, B, dobernier.
10:06Question number 31 is, which gas is commonly known as laughing gas?
10:11A, nitrogen, B, oxygen, C, nitrous oxide, D, carbon dioxide.
10:17The correct option is, C, nitrous oxide.
10:22And its formula is, N2O.
10:27Question number 32 is, which of the following is a noble gas?
10:32A, oxygen, B, helium, C, chlorine, D, nitrogen.
10:38The correct option is, B, helium.
10:43Question number 33 is, what is the pH of a neutral solution?
10:51A, 7, B, 14, C, 0, D, 1.
10:55The correct option is, A, 7.
11:00Question number 34 is, which gas is produced during photosynthesis?
11:07A, oxygen, B, carbon dioxide, C, hydrogen, D, nitrogen.
11:13The correct option is, A, oxygen.
11:17Question number 35 is, what is the process of conversion of water vapor into liquid water
11:25called, A, evaporation, B, condensation, C, sublimation, D, solidification.
11:33The correct option is, B, condensation.
11:37Question number 36 is, which subatomic particle carries a negative charge?
11:43A, proton, B, neutron, C, electron, D, positron.
11:48As proton carries positive charge, neutron is neutral, and positron also carries positive
11:54charge.
11:55So, the correct option is, C, electron.
11:58Electron carries negative charge.
12:01Question number 37 is, what is the primary component of natural gas?
12:09A, methane, B, ethane, C, propane, D, butane.
12:14The correct option is, A, methane.
12:18And its formula is, CH4.
12:21Question number 38 is, in the periodic table, which group contains noble gases?
12:28A, group 1, B, group 7, C, group 8, D, group 18.
12:34The correct option is, D, group 18.
12:39Question number 39 is, which element is essential for life and is found in all organic compounds?
12:49A, nitrogen.
12:50B, carbon.
12:51C, oxygen.
12:52D, hydrogen.
12:54The correct option is, B, carbon.
12:58Question number 41 is, what is the common name for ascorbic acid?
13:25A, vitamin A, B, vitamin C, C, vitamin D, D, vitamin K.
13:33The correct option is, B, vitamin C.
13:38Question number 42 is, which of the following is a halogen?
13:42A, sodium.
13:44B, fluorine.
13:45C, magnesium.
13:47D, potassium.
13:48The correct option is, B, fluorine.
13:53Question number 43 is, which gas gives fizzy drinks their bubbles?
13:59A, oxygen.
14:00B, carbon dioxide.
14:02C, nitrogen.
14:03D, helium.
14:04The correct option is, B, carbon dioxide.
14:07And its formula is, CO2.
14:10Question number 44 is, what is the smallest unit of an element that retains its chemical properties?
14:19A, atom.
14:20B, molecule.
14:22C, ion.
14:23D, isotope.
14:24The correct option is, A, atom.
14:28Question number 45 is, which gas is produced when an acid reacts with a metal?
14:35A, hydrogen.
14:37B, oxygen.
14:38C, nitrogen.
14:39D, carbon dioxide.
14:41The correct option is, A, hydrogen.
14:46Question number 46 is, in the periodic table, which period corresponds to the transition metals?
14:54A, second period.
14:56B, third period.
14:57C, fourth period.
14:59D, fifth period.
15:01The correct option is, C, fourth period.
15:05Question number 47 is, which of the following is a transition metal?
15:10A, sodium.
15:12B, zinc.
15:13C, copper.
15:14D, calcium.
15:15The correct option is, C, copper.
15:18Copper is a transition metal.
15:22Question number 48 is, which element is present in all organic compounds?
15:29A, nitrogen.
15:30B, carbon.
15:31C, oxygen.
15:32D, hydrogen.
15:34The correct option is, B, carbon.
15:37Carbon is present in all organic compounds.
15:43Question number 49 is, which gas is responsible for the smell of rotten eggs?
15:50A, hydrogen sulfide.
15:52B, methane.
15:54C, ammonia.
15:55D, sulfur dioxide.
15:57The correct option is, A, hydrogen sulfide.
16:01And its formula is, H2S.
16:05The question number 50 is, what is the main component of natural gas?
16:12A, methane.
16:13B, ethane.
16:14C, butane.
16:15D, propane.
16:16The correct option is, A, methane.
16:20Methane is the main component of natural gas.
16:23And its formula is, CH4.
16:26b, water.
16:27And I, for pleasure.
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