Acetylene has....bonds:

1.  2σ, 2π

2.  2σ,3π

3.  3σ,2π

4.  3σ,3π

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4
Correct Answer :

3σ,2π


Explanation :
No Explanation available for this question

50g of calcium carbonate was completely burnt in air. What is the weight (in grams) of the residue (Atomic weight of Ca, C and O are 40, 12 and 16 respectively)

1.  2.8

2.  28

3.  4.4

4.  44

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4
Correct Answer :

28


Explanation :
No Explanation available for this question

What are the conditions under which the relation between volume(V) and number of moles(n) of gas is plotted(p=pressure, T=temperature)

1.  Constant P and T

2.  Constant T and V

3.  Constant P and V

4.  Constant n and V

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4
Correct Answer :

Constant P and T


Explanation :
No Explanation available for this question

7.5g of a gas occupies 5.6L of volume at S.T.P. The gas is.........:

1.  NO

2.  N2O

3.  CO

4.  CO2

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4
Correct Answer :

NO


Explanation :
No Explanation available for this question

250ml of a sodium carbonate solution contains 2.65g of Na2CO3.10ml of this solution is added to x ml, of water to obtain 0.001M  Na2CO3  solution. What is the value of x in ml(Molecular weight of Na2CO3=106)

1.  1000

2.  990

3.  9990

4.  90

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4
Correct Answer :

990


Explanation :
No Explanation available for this question

The pH of a 0.1M aqueous solution of a weak acid (HA) is 3. What is its degree of dissociation

1.  1%

2.  10%

3.  50%

4.  25%

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4
Correct Answer :

1\%


Explanation :
No Explanation available for this question

The pH range of methyl red indicator is:

1.  4.2 to 6.3

2.  8.3 to 10.0

3.  8.0 to 9.6

4.  6.8 to 8.4

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4
Correct Answer :

4.2 to 6.3


Explanation :
No Explanation available for this question

One faraday of electricity is passed separately through one litre of one molar aqueous solutions of (i) AgNO3, (ii) SnCl4, (iii) CuSO4. The number of moles of Ag, Sn and Cu deposited at cathode are respectively

1.  1.0, 0.25, 0.5

2.  1.0, 0.5, 0.25

3.  0.5,1.0, 0.25

4.  0.25, 0.5, 1.0

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4
Correct Answer :

1.0, 0.25, 0.5


Explanation :
No Explanation available for this question

Aqueous copper sulphate solution is electrolysed using platinum electrode. The electrode reaction occurring at cathode is:

1.  Cu2+(aq)+2e- → Cu(s)

2.  Cu(s) → Cu2+(aq)+2e-

3.  2H2O(l) → O2(g)+4H+(aq)+4e-

4.  O2(g)+4H+(aq)+4e- → 2H2O(l)

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4
Correct Answer :

Cu<sup>2+</sup>(aq)+2e<sup>-</sup> &#8594; Cu(s)


Explanation :
No Explanation available for this question

The rate of reaction for A → product is 10 mol L-1min-1 at time t1=2minutes. What will be the rate (in mol L-1min-1) at time t2=12minutes

1.  more than 10

2.  less than 10

3.  10

4.  20

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4
Correct Answer :

less than 10


Explanation :
No Explanation available for this question
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