DRONA COACHING CENTRE NARNAUL
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Burning coal in a closed room will produce
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7%
(a) nitrogen oxides
34%
(b) carbon dioxide
57%
(c) carbon monoxide
1%
(d) oxygen
Which unit is used to measure astronomical distances?
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15%
a) Leap year
75%
(b) Light year
5%
(c) Century
6%
d) Sound year
Which planet is called morning star or evening star?
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57%
(a) Venus
18%
(b) Mars
21%
(c) Jupiter
4%
(d) Mercury
🔺Which of the following does not conduct electricity?
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56%
(a) Sugar solution
22%
(b) Vinegar solution
13%
(c) Lemon juice solution
9%
(d) Caustic soda solution
The control centre of all the activities of a cell is
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6%
a) organelles
17%
b) nucleoplasm
20%
c) cytoplasm
57%
(d) nucleus
A temperature at which the substance burns is called
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11%
(a) melting
41%
(b) boiling temperature
39%
(c) kindling temperature
10%
(d) evaporation
🔺Name the gas evolved when magnesium reacts with dilute hydrochloric acid
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16%
(a) Chlorine
13%
(b) Oxygen
68%
(c) hydrogen
3%
(d) Nitrogen
Which of the following can be charged with static electricity ?
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32%
(a) Metal
20%
(b) Alloy
33%
c) Insulator
15%
(d) Semiconductor
🔼Which of the following occurs during lightning?
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12%
(a) Acid rain
31%
(b) Nitrogen fixation
17%
(c) Green house effect
41%
(d) Earthing
Which is not a natural phenomena?
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9%
(a) Earthquakes
12%
(b) Cyclones
17%
(c) Lightning
62%
(d) Earthing
The male gamete or sperm consists of
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42%
(a) three parts
39%
(b) two parts
15%
(c) four parts
4%
(d) none of these
The cell formed after fertilisation is called
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20%
(a) embryo
12%
(b) foetus
63%
(c) zygote
5%
(d) egg
Which one of the following is not a part of female reproductive organs?
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6%
a) Uterus
8%
(b) Ovary
8%
(c) Oviduct
77%
d) Penis
In Hydra, the mode of reproduction is
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55%
(a) asexual
9%
(b) sexual
33%
(c) both (a) and (b)
2%
(d) none of these
🔻Which has maximum number of molecules?
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27%
(a) 1 g of CO2
36%
(b) 1 g of H2
14%
(c) 1 g of N2
24%
(d) 1 g of CH4
🔺Which of the following isotope is used in the treatment of blood cancer?
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22%
(a) P-32
25%
(b) I-131
40%
(c) Co-60
13%
(d) any of these
Isobars do not differ in the number of
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24%
(a) protons
30%
(b) electrons
29%
(c) neutrons
17%
(d) nucleons
🔸Which of the following has the strongest interparticle forces at room temperature?
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20%
(a) Oxygen
21%
(b) Water
24%
(c) Bromine
35%
(d) Iron