1. No category

NTSE CHEMISTRY SAMPLE PAPER
1.
2.
The mass of sodium in 11.7 g of sodium chloride is
(a) 2.3 g
(b) 4.6 g
(c) 6.9 g
(d) 7.1 g
CaCO3
2HCl
CaCl2
H2O CO2 The mass of calcium chloride formed when 2.5 g
.
calcium carbonate are dissolved in excess of hydrochloric acid is
3.
4.
5.
(a) 1.39 g
(b) 2.78 g
(c) 5.18
(d) 17.8 g
The value of e/m of an electron was measured by
(a) Millikan
(b) J.J. Thomson
(c) Dalton
(d) Rutherford
The diagram given below represents an atom of
(a) chlorine
(b) magnesium
(c) calcium
(d) helium
Which of the following has zero electron affinity?
(a) Radon
(b) Nitrogen
(c) Oxygen
(d) Radium
6.
7.
The correct order of second IE of C, N, O and F are in the order
(a) F > O > N > C
(b) C > N > O > F
(c) O > N > F > C
(d) O > F > N > C
When of the following is a non-polar molecule?
(a) is covalent only
(b) is electrovalent
(c) consists of three covalent nitrogen hydrogen bonds and an electrovalent bond
between the ammonia molecule and the chlorine atom
(d) consist of four covalent nitrogen hydrogen bonds and one electrovalent bond
between the ammonium ion and chloride ion
8.
9.
10.
Which of the following molecules have a pyramidal structure?
(a) PCl5
(b) NH3
(c) BF3
(d) SiF4
In the reaction 2FeCl2 + Cl2
(a) an oxidizing agent
(b) a reducing agent
(c) a catalyst
(d) providing an inert medium
In the following equations
Na 2CO3
11.
2FeCl3 chlorine may be regarded as
xHCl
2NaCl CO2 H2O the value of x is
(a) 1
(b) 2
(c) 3
(d) 4
Which of the following will have the highest rate of reaction?
(a) Weathering of rocks
(b) Neutralisation of HCl with sodium hydroxide
(c) Rusting of iron
(d) None of these
12.
For which of the following reaction are the numerical values of K p and K c the same?
(a) 2NOCl (g)
2NO(g) Cl2 (g)
(b) N2 (g) + 3H2 (g)
(c) H2 (g) + Cl2 (g)
(d) H2 (g) + I2 (s)
13.
2NH3 (g)
2HCl(g)
2HI (g)
Copper does not react with dilute HCl but reacts in the presence of air or oxygen
because
(a) copper is ranked lower than hydrogen in the activity series
(b) HCl is not an oxidizing agent
(c) air or oxygen oxidises the the copper metal to copper
2 ion
(d) all of these
14.
15.
Sulpher on reaction with concentrated sulphuric acid forms sulpher dioxide. According to
this reaction, sulphuric acid is behaving as
(a) drying agent
(b) oxidizing agent
(c) dehydrating agent
(d) none of these
The average composition of ordinary glass is
(a) Na 2O.CaO.6SiO2
(b) Na 2 O.2CaO.3SiO2
(c) Na 2O.CaO.6SiO2 .Cr2O3
(d) Na 2 O.CaO.PbO.6SiO2
16.
17.
The windscreen of cars, aeroplanes, etc, is made up of
(a) hard glass
(b) safety glass
(c) lead glass
(d) soda glass
A hydrocarbon is
(a) a compound containing carbon, hydrogen and oxygen
(b) is sodium hydrogen carbonate
(c) a compound containing carbon and hydrogen and oxygen
(d) a derivative of benzene
18.
19.
The formula of ethyne is
(a) C2H2
(b) C6H6
(c) C2H4
(d) C2H6
CH3COCH3
propanone
alkaline
KMnO4
‘X’
acid
+
H
‘Y’
The compound ‘Y’ is
20.
(a) propanoic acid
(b) propanal
(c) ethanoic acid
(d) propanol 1
Which of the following is NOT an addition polymer?
(a) Neoprene
(b) Teflon
(c) Polyviny chloride
(d) Polyamide
NTSE CHEMISTRY SAMPLE PAPER
1.
(c)
2.
(b)
3.
(a)
4.
(b)
5.
(a)
6.
(d)
7.
(d)
8.
(b)
9.
(a)
10.
(b)
11.
(b)
12.
(c)
13.
(d)
14.
(b)
15.
(a)
16.
(b)
17.
(c)
18.
(d)
19.
(c)
20.
(d)