NTSE SAT Chemistry Papers 10

NTSE SAT Chemistry Papers 10

This is NTSE SAT Chemistry Papers 10 .. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Atomic weight of an element is 30, its equivalent wt. is 10. The valency of element will be-
  • A
    3
    Correct
  • B
    1
  • C
    2
  • D
    4
2
Specific heat of any element is 0.1. The nearest atomic wt. of that element will be-
  • A
    62
  • B
    64
    Correct
  • C
    48
  • D
    32
3
The number of molecules in one mole of gas is-
  • A
    \(6.023 \times {10^{22}}\)
  • B
    \(6.023 \times {10^{20}}\)
  • C
    \(6.023 \times {10^{23}}\)
    Correct
  • D
    \(6.023 \times {10^{21}}\)
4
In the given below \(Mn{O_2}\)is catalyst as-
  • A
    Negative Catalyst
  • B
    Induced Catalyst
  • C
    Auto Catalyst
  • D
    None of these
    Correct
5
How much MgO is obtained on heating 5 gm of \(\left( {MgC{O_3}} \right)\)Magnesium Carbonate-
  • A
    2.4 gm
  • B
    2.8 gm
  • C
    2.38 gm
    Correct
  • D
    3.28 gm
6
Valency of Cr in \(CrP{O_4}\) is-
  • A
    1
  • B
    4
  • C
    2
  • D
    3
    Correct
7
Graphite is used as a lubricant in machines because it has a very high melting point and also it:
  • A
    is crystalline
  • B
    is a liquid at room temperature
  • C
    is a giant molecule
  • D
    has layer structure
    Correct
8
Which of the following oxyacid of phosphorus are monobasic (monoprotic)?
  • A
    \({H_3}P{O_3}\)
  • B
    \({H_3}P{O_2}\)
  • C
    \({H_4}{P_2}{O_7}\)
    Correct
  • D
    \({H_3}P{O_4}\)
9
The percentage of gold present in 20 carat gold is
  • A
    83.33
    Correct
  • B
    100
  • C
    73.86
  • D
    50
10
8.7 g of pure \(Mn{O_2}\)is heated with an excess of HCl and the gas evolved is passed into a solution of KI. Calculate the weight of the iodine librated (Mn = 55, Cl = 35.5, I = 127)
  • A
    7.77 g
  • B
    12.70 g
  • C
    25.4 g
    Correct
  • D
    16.41 g
11
Which of the following aldehyde undergo cannizzaro reaction?
  • A
    \({C_3}{H_7}CHO\)
  • B
    \({C_6}{H_5}CHO\)
    Correct
  • C
    \(C{H_3}C{H_2}CHO\)
  • D
    \(C{H_3}CHO\)
12
Which one of the following bases is not present in DNA?
  • A
    Thymine
  • B
    Adenine
  • C
    Cytosine
  • D
    Quinoline
    Correct
13
Which one of the following is classified as a condensation polymer?
  • A
    Acrylonitrile
  • B
    Dacron
    Correct
  • C
    Neoprene
  • D
    Teflon
14
Acidified \(KMn{O_4}\) is decolorized by
  • A
    Mortar salt
    Correct
  • B
    Haematite
  • C
    Ferric ammonium alum
  • D
    A neutral ferric chloride solution
15
Which of the following evolve \({O_2}\) on treatment with water?
  • A
    Na
  • B
    \({P_4}\)
  • C
    \({F_2}\)
    Correct
  • D
    \(C{I_2}\)