Marks; 40 (CHAPTER-1) Time: 40 minutes
1; During
a chemical change, the Particles involved are.
1;Electron (2) Protons (3) Proton and Neutron (4)
Neutron and Electron.
2; Elements
having similar chemical properties will have.
(1) Similar Physical State (2)
Similar Electronic configuration
(3) Similar Oxidation number (4) Similar Atomic Size.
3; Which is not
a molecule.
(1)
NaCl (2)
H2 O (3)
HCl (4)CH4
4; CH4,
NH3 , HF and Na+,all of these have
(1) Same
mass (2)
same no of proton
(3)
Same no of electrons (4)
same no of neutrons
5; When an
electron is added to a uni positive ion we get.
(1)
Di positive ion (2) uni negative
ion (3) neutral atom (4) molecule
6; An atom has
a net charge of –1. It has 18 electrons and 20 neutrons. Its mass number is
(1)38 (2)39 (3)37 (4)20
7; Avogadro, s
number of carbon atoms weighs
(1) 1.2 x
1023g (2) 12g (3) 1.2 x 10 24 g (4)
12amu
8; Total
volume of oxygen required for the complete combustion of mixture of
5 cm3 of CH4 and 5 cm3 of C2H4
?
(1)
5 cm3 (2) 25 cm3 (3) 20
cm3 (4) 10 cm3
9; How many
atoms of carbon are there in18g of glucose (C6H12O6.)
(1) 6.02 x
1023 (2) 3.6 x 1023 (3) 3.6 x 1022 (4) 1.2 x 1025
10; How many
grams of Al2O3 can be produced
from 9g Al and 9g of O2. (1)17g (2) 18g (3)19g (4)34g
11; A compound X3O4
contain 72.03% X and 27.9% oxygen by weight.
What is the atomic weight of X?
(1)30.98 (2)9.013 (3)54.94 (4)19.00
12; what volume
of air is needed for the complete
combustion of 500 cm3 of H2 (1)500 cm3 (2)325 cm3 (3)1250
cm3 (4)250 cm3
13; A
compound Y contains 2.98g of C per g of H. Its empirical formula is : (1)CH2 (2)CH (3)CH3 (4)CH4
14; Number of
C-atoms in 1g of CaCO3 are
(1) 6.022 x
1023 (2) 6.02 x 1021 (3)
3.01 x 1023 (2)1.204 x
1023
15; All
of the following are not pure substance except
(1)Hard water
(2)heavy water (3)Rain water
(4)tap water
16; Which statement about one mole of a metal is always correct?
(1) It contains the same number of atoms
as1mole of hydrogen atoms.
(2)
it contain the same number of atoms
as1/12 mole of C-12 (3) It
has the same mass as 1 mole of hydrogen atom. (4) It is liberated by 1 mole of electrons.
17; Which of the
following contain 1mole of the stated particles?
(1) Chlorine molecules in 35.5g of chlorine
gas
(2) Electrons in 1g of hydrogen gas.
(3) Hydrogen ions in 1 dm3 of 1 mol
dm-3 aqueous sulfuric acid
(4) Oxygen atoms in 22.4 dm3 of
oxygen gas at s.t.p
18; In
a sample of this sulphate (S2 O3)-2 ions, If
the mass of S – is 32,
then what is the mass of O2.
(1) 8 g (2) 4.8 g (3) 2.4 g (4) 24 g.
19; Species have
the same no of electrons are called.
(1) Iso
electronic (2) Isobar (3) Isomer (4) Isotones.
20; The
element containing only one isotope
(1) Mg (2)
Al (3) Au (4)
Hg.
21; A Compound containing 30.6 % N and its
molar mass is 228.3 How many N-atoms are there in the molecule of the compound.
(1) 6 (2) 5 (3) 4
(4) 3
22; A Limiting
reactant is one
(1), which produce more product (2), which consumed earlier
(3) Not effect the yield (4) increase
the yield.
23; Which of
the following is a substance
(1) Sea
water (2) Brass (3) Tap water (4) graphite
24; The mass of 3.01 x 1021 atoms
of Hg is.
(1) 1.00 g
(2) 2.00g (3) 5.00x 10-8 g (4)
200g.
25; What weight of CO2 will
contain the same number of oxygen atoms as present in 3.6 g of water? (1) 4.4 g (2)
8.8g (3)7.2 (4) 220g
26; How much iron can be converted into Fe3 O4 by 1000 g of 80
% Oxygen.
(1) About 2 Kg (2)
About 10 Kg (3) About 8 Kg (4)
About 100g
27; The number of
moles of atoms in 98 grams of H2SO4 is
1;1 mole 2; 2moles 3; 5 moles 4; 7 moles
28 the number of atoms in 11.2 liter of CO2
is
1;
6.02 X 1023 2;
11.2 X 6.02 X 1023
3;1½ x6.02 X 1023 4;
21/2 x6.02 X 1023
29; Te volume of NH3 obtained by
the reaction of 10 ml of nitrogen with
30ml of hydrogen is
1; 10 ml 2; 20 ml 3; 30 ml 4; 40 ml
30 Which
one of the following has 100% natural abundance?
(1) Cl-35 (2)
Br-80 (3) I-127 (4) H-1
31 What
is the charge on sodium ion, sodium nucleus and sodium atom?
(1)+1,
+11and 0 (2) +11, +1and +1
(3)
+11, +11and 0 (4)
+1, +1and 0
32 Which one of the following is molecule?
(1) As (2) Ar (3) Au (4)
Am
33 Which one of the following is molecular
ion?
(1) CO3-2 (2) CO2+1 (3)NH4+1 (4) NO3-1
34 The number of grams of C12H22O11
which contain 352g of O2.
(1) 176 g (2) 352 g (3) 80 g (4) 256 g.
35 A given sample of AlCl3
contains 6.02 X 1020 Al+3 ions. The mole of Cl-
ions is
(1)1.0 X 10-3 (2) 3 X 10-3 (3) 3 X 10+3 (4) 0.33 X 10-3
36 The
number of C2 H6 molecules that you have in 0.050 moles of
C2 H6 is.
(1) 2.4 x 1023 (2)
3.01 x 1022 (3) 8.3 x
10-26 (4) 3.0 x 10-22
37 The % age Al in Al2 O3
by weight is At. Wt of Al = 27, O = 16
(1)
47.1 % (2)
26.5 % (3)
52.9 % (4)
40.0 %
38 The species that have the same number of
electrons as 35Cl17 is
(1) 3517Cl- (2) 3216S
+ (3) 4018Ar+ (4)3216S
-2
39 1
mole of ethanol and 1 mole of diethyl ether have different
1;
molar mass 2;
number of molecules 3; number of atoms 4;
chemical properties
40 Which of the following sets
contain only compounds?
(1)
Air, water, sodium
(2)
Hydrogen, ammonia, oxygen
(3)
Carbon monoxide, phosphine , phosgene
(4)
Table salt, glucose, German silver
MR
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