1)The collective study of separation, identification and quantitative determination of the composition of different substances is dealt under chemistry.
(A) analytical (B) organic (C ) inorganic (D) bio
2) The application of chemical research, techniques to the synthesis of pharmaceuticals is studied under which branch of chemistry?
(A) Inorganic chemistry
(B) Medicinal chemistry
(C) Green chemistry
(D) Nano chemistry
3)comprises of a single type of particle present in a fixed ratio in which all the constituent particles are same in their chemical nature.
(A) Homogeneous mixture (B) Heterogeneous mixture (C) Pure substance (D) Mixture
4) Identify the CORRECTLY matched pair.
(A) Bronze Pure substance (B) Iron Compound (C) Vinegar Mixture
(D) Naphthalene -Mixture
5) Which out of the following is a heterogeneous mixture?
(A) Air
(B) Solution of salt in water
(C) Solution of sugar in water
(D) Smoke
6) The mass of an iron cube having density 7 87 g cm'3 is 787 g.1ts volume expressed in
scientific notation is ems.
(A) 1.0 x 10' (B) 1.00x102 (C) 1.00 x 103 (D) 100
7) The number of significant figures in 0.0310 is
(A) 2' (B) 3 (C) 4 (D) 5
8) 18.236 is rounded off to four significant figures as .
(A) 18.20 (B) 18.23
(C) 18.2360 (D) 18.24
9) The following values have same significant figures, EXCEPT ,
(A) 4.008 (B) 6.022 x1023 (C) 7555 (D) 0.0034
10) For the following calculation, the fmal answer rounded to proper number of significant figures IS
-------------- (2.0..=x2303)+2000 ?
(A) 24.06 (B) 24.6
(C) 24.60 (D) 24.606
11) which of the following reaction is CORRECT according to the law of conservation of mass?
(A) Mg<s> + 02(g) -> MgO
(B) C3H8(s) + 02(g) -> C02<g> + H20<g>
(C) P4<s> + 502(g) -> P4010(s)
(D) 2CH4(g) + 202(g) -) 2C02(g) + 2H20(g)
12) Which of the following pair of substances illustrate law of multiple proportion?
(A) H20, N320
(B) NaCl, NaBr
(C) SnClz, SnCl4
(D) MgO, Mg(OH)2
12) What volume of ammonia would be formed when 0.18 dm3 of nitrogen reacts with excess amount of hydrogen? (all volumes are measured under same conditions of temperature and pressure).
(A) 0.18am3 (B) 0.36 dm3
(C) 0.54 dm3 (D) 0.72 dm3
13) Two containers of the same size are filled separately with 02 gas and CH4 gas. Both the containers under the same temperature and pressure will contain the same
(A) number ofatoms
(B) mass ofgas
(C) number of molecules
(D) number of electrons
14) Which of the following reactions does NOT obey law of conservation of mass?
(A) Endothermic reaction
(B) Exothennic reaction
(C ) Neutralization reaction
(D) Nuclear reactions
15) Assertion: H30 and 020 follow law of
multiple proportions.
Reason: Law of multiple proportions hold good when compounds are obtained by using different isotopes of the same element.
(A) Assertion and Reason are true. Reason is correct explanation of Assertion.
(B) Assertion and Reason are true. Reason is not the correct explanation of Assertion.
(C) Assertion is true. Reason is false.
(D) Assertion is false. Reason is true.
16) ____________ are the smallest particles of matter
was one of the assumptions of Dalton’s atomic theory
(A) Atoms (B) Molecules (C) Ions (D) Elements
17) _________1 amu is equal to
(A) i of the mass of C-12 atom (B) i of the mass of N-14 atom (C) 1 g of H2 (D) 1.66 x 10*-23
18) The molecular mass of carbon monoxide is 28. What is the unit of molecular mass?
(A) g (B) mol (C) a.m.u (D) mol g-l
19) One______ is the collection of 6.022 x 10*23 atoms /molecules/ions.
(A) kilogram (B) candela (C) mole (D) gram
20) What is the mass of 0.5 mole of ammonia?
(A) 8.5 g (B) 16 g
(C) 24 g (D) 48 g
21) If NA is the Avogadro’s number then number of valence electrons in 8.5 g of chloride ions
(C1‘) is ________
(A) 1.9 NA (B) 3.2 NA (C) 4 NA (D) 8 NA
22) 39.4 kg of gold was recovered from a smuggler. How many atoms of gold were recovered? (Au = 197)
(A) 200 (B) 6.022x10*23 (C) 12.04x10*24 (D) 12.04x10*25
(A) analytical (B) organic (C ) inorganic (D) bio
2) The application of chemical research, techniques to the synthesis of pharmaceuticals is studied under which branch of chemistry?
(A) Inorganic chemistry
(B) Medicinal chemistry
(C) Green chemistry
(D) Nano chemistry
3)comprises of a single type of particle present in a fixed ratio in which all the constituent particles are same in their chemical nature.
(A) Homogeneous mixture (B) Heterogeneous mixture (C) Pure substance (D) Mixture
4) Identify the CORRECTLY matched pair.
(A) Bronze Pure substance (B) Iron Compound (C) Vinegar Mixture
(D) Naphthalene -Mixture
5) Which out of the following is a heterogeneous mixture?
(A) Air
(B) Solution of salt in water
(C) Solution of sugar in water
(D) Smoke
6) The mass of an iron cube having density 7 87 g cm'3 is 787 g.1ts volume expressed in
scientific notation is ems.
(A) 1.0 x 10' (B) 1.00x102 (C) 1.00 x 103 (D) 100
7) The number of significant figures in 0.0310 is
(A) 2' (B) 3 (C) 4 (D) 5
8) 18.236 is rounded off to four significant figures as .
(A) 18.20 (B) 18.23
(C) 18.2360 (D) 18.24
9) The following values have same significant figures, EXCEPT ,
(A) 4.008 (B) 6.022 x1023 (C) 7555 (D) 0.0034
10) For the following calculation, the fmal answer rounded to proper number of significant figures IS
-------------- (2.0..=x2303)+2000 ?
(A) 24.06 (B) 24.6
(C) 24.60 (D) 24.606
11) which of the following reaction is CORRECT according to the law of conservation of mass?
(A) Mg<s> + 02(g) -> MgO
(B) C3H8(s) + 02(g) -> C02<g> + H20<g>
(C) P4<s> + 502(g) -> P4010(s)
(D) 2CH4(g) + 202(g) -) 2C02(g) + 2H20(g)
12) Which of the following pair of substances illustrate law of multiple proportion?
(A) H20, N320
(B) NaCl, NaBr
(C) SnClz, SnCl4
(D) MgO, Mg(OH)2
12) What volume of ammonia would be formed when 0.18 dm3 of nitrogen reacts with excess amount of hydrogen? (all volumes are measured under same conditions of temperature and pressure).
(A) 0.18am3 (B) 0.36 dm3
(C) 0.54 dm3 (D) 0.72 dm3
13) Two containers of the same size are filled separately with 02 gas and CH4 gas. Both the containers under the same temperature and pressure will contain the same
(A) number ofatoms
(B) mass ofgas
(C) number of molecules
(D) number of electrons
14) Which of the following reactions does NOT obey law of conservation of mass?
(A) Endothermic reaction
(B) Exothennic reaction
(C ) Neutralization reaction
(D) Nuclear reactions
15) Assertion: H30 and 020 follow law of
multiple proportions.
Reason: Law of multiple proportions hold good when compounds are obtained by using different isotopes of the same element.
(A) Assertion and Reason are true. Reason is correct explanation of Assertion.
(B) Assertion and Reason are true. Reason is not the correct explanation of Assertion.
(C) Assertion is true. Reason is false.
(D) Assertion is false. Reason is true.
16) ____________ are the smallest particles of matter
was one of the assumptions of Dalton’s atomic theory
(A) Atoms (B) Molecules (C) Ions (D) Elements
17) _________1 amu is equal to
(A) i of the mass of C-12 atom (B) i of the mass of N-14 atom (C) 1 g of H2 (D) 1.66 x 10*-23
18) The molecular mass of carbon monoxide is 28. What is the unit of molecular mass?
(A) g (B) mol (C) a.m.u (D) mol g-l
19) One______ is the collection of 6.022 x 10*23 atoms /molecules/ions.
(A) kilogram (B) candela (C) mole (D) gram
20) What is the mass of 0.5 mole of ammonia?
(A) 8.5 g (B) 16 g
(C) 24 g (D) 48 g
21) If NA is the Avogadro’s number then number of valence electrons in 8.5 g of chloride ions
(C1‘) is ________
(A) 1.9 NA (B) 3.2 NA (C) 4 NA (D) 8 NA
22) 39.4 kg of gold was recovered from a smuggler. How many atoms of gold were recovered? (Au = 197)
(A) 200 (B) 6.022x10*23 (C) 12.04x10*24 (D) 12.04x10*25