Find real questions from previous competitive exam papers with answers and solutions.
Browse complete papersKirchhoff's voltage law is a consequence of
Conservation of Charge
Conservation of Energy
Conservation of Momentum
Conservation of Mass
Correct answer
Conservation of Charge
The SI unit of impulse is
\(Ns^{-2}\)
\(Ns^2\)
Ns
\(Ns^{-1}\)
Correct answer
\(Ns^{-2}\)
Match the following
| List - I | List -II |
|---|---|
| A) Pyrolusite | I) Sulphide |
| B) Horn silver | II) Sulphate |
| C) Cinnabar | III) Silicate |
| D) Gypsum | IV) Oxide |
| V) Halide |
A-V, B-IV, C-III, D-I
A-IV, B- V, C-I, D-II
A-IV, B-II, C-I, D-V
A-II, B-III, C-IV, D-I
Correct answer
A-V, B-IV, C-III, D-I
In India for making ornamental gold we use 22 carat gold. This is an alloy of
22 parts of gold + 2 parts of copper
19 parts of gold + 3 parts of copper
18 parts of gold + 4 parts of copper
17 parts of gold + 7 parts of copper
Correct answer
22 parts of gold + 2 parts of copper
Identify the sweet odoured organic substance from the following
Chloroform
Acetaldehyde
Ethyl acetate
Acetic acid
Correct answer
Chloroform
Ethanoic acid liberates hydrogen gas when it react with which of the following?
NaOH
NaHCO3
Na2CO3
Na
Correct answer
NaOH
The volatile metal compounds of copper, calcium, strontium are generally used in fire works to get colours. This is because these metals have
low ionisation enthalpies
high ionisation enthalpies
high electronegativity values
High electron gain enthapies
Correct answer
low ionisation enthalpies
What is the amount of hydrochloric acid present in its aqueous solution having \(P^H = 2\) in \(gL^{-1}\)? (molar mass of Hydrochloric acid - 36.5g \(mol^{-1}\))
3.65
7.30
0.365
0.730
Correct answer
3.65
From the list of metals furnished here under, the number of metals which can react with both acids and bases is
a) Aluminium
b) Zinc
c) Beryllium
d) Iron
e) Calcium
2
1
3
4
Correct answer
2
What are the gaseous products liberated at anode and cathode respectively when dilute aqueous solution of Sulphuric acid is electrolysed?
SO2, H2
H2, SO2
H2, O2
O2, H2
Correct answer
SO2, H2