1 |
Paalladium has isotopes. |
6
<sub>7</sub>
8
9
|
2 |
Which is not a molecular ion. |
He+
CH3+
NH3-
CO+
|
3 |
In Al2O3, the ratio between the ions is |
1 :2
2:1
2:3
3:2
|
4 |
Haemoglobin is a Macro molecule and consists of approximately atoms. |
5000
10,000
68000
15000
|
5 |
The largest number of molecule are present. |
3.6 g of H2O
4.6 g of C2H5OH
2.8 g of CO
5.4 g of N2O5
|
6 |
Nickel has isotopes |
3
5
6
11
|
7 |
Bromine has isotopes |
2
4
8
6
|
8 |
Cadmium has isotopes. |
3
4
5
9
|
9 |
Actual yield is mostly less than the theoretical yield due to the reason that |
Rates of reactions are slow
Loss of the product during handling
Reactions are never completed 100%
Law of conservation of mass is not true
|
10 |
A limiting reactant is that one which |
Gives greatest number of moles of products
Gives least number of moles of products
Is left behind after the completion of reaction
Is mostly a cheaper substance as compared to other reactants
|
11 |
How many moles of AgCI are produced by combination of 1.0 mole of AgNO3and 2.0 mole of NaCI |
1.0
2.0
3.0
4.0
|
12 |
In stoichiometric calculations |
The reaction can be reversile
Side products can be formed
Law of conservation of mass may not be obeyed
Law of definite proportions is definitely obeyed
|
13 |
One mole of CH3OH and one mole of C2H5OH have |
Equal number of atoms
Equal number of molecules
Equal number of electrons
Equal number of protons
|
14 |
The volume occupied by 1.6 g of O2at STP is |
22.4 dm<sup>3</sup>
2.24 dm<sup>3</sup>
1.12 dm<sup>3</sup>
112 dm<sup>3</sup>
|
15 |
I molar volume of a gas at S.T.P is occupied by |
1 g of gas
6 x 10<sup>23</sup>g of gas
22.4 m<sup>3</sup>of gas
1 gram molecular mass of gas
|
16 |
Which of the following compound has the highest % o f oxygen by weight |
CH<sub>3</sub>- OH
C<sub>2</sub>H<sub>5</sub>OH
HCOOH
H<sub>2</sub>O
|
17 |
Tin has Isotopes |
7
9
11
5
|