Tuesday, 20 June 2017

NTSE Science Quiz - 25 (SAT 2016) (#ntseQuiz) (#scienceQuiz) (#cbseNotes)

NTSE Science Quiz - 25

(SAT 2016)

NTSE Science Quiz - 25 (SAT 2016) (#ntseQuiz) (#scienceQuiz) (#cbseNotes)

Q1: Cow has a special stomach as compared to that of lion in order to:

(a) absorb food in better manner
(b) digest cellulose present in the food
(c) assimilate food in a better way
(d) absorb large amount of water

Q2: Pancreas is composed of -

(a) Only exocrine cells
(b) Only endocrine cells
(c) Both exocrine and endocrine
(d) Nephron


Q3: Which one of the following animals is different from others is not having the parried gill pouches ?

(a) Whale
(b) Water snake
(c) Star fish
(d) Sea horse



Q4: Which of the following is a result of biological magnification ?

(a) Top level predators may be most harmed by toxic chemicals in environment
(b) Increase in carbon dioxide
(c) The green-house effect t will be most significant at the poles
(d) Energy is lost at each tropic level of a food chain




Q5: The human embryo gets nutrition form the mother blood with the help of a special organ called –

(a) Zygote
(b) Ovary
(c) Placenta
(d) Oviduct


Q6: What is the main reason for increase in temperature in a glass house ?

(a) Radiation fails to escape from the glass house completely
(b) Sunlight is completely absorbed by plants in the glass house
(c) Plants do not utilize sunlight in a glass house
(d) Plants produce heat inside the glass house


Q7: Suppose a mutant of a photosynthetic alga has dysfunctional mitochondria. It would affect its ability to perform –

(a) glycolysis
(b) anascrobic respiration
(c) photosynthesis
(d) aerobic respiration


Q8: The metal used to recover copper from an aqueous solution of copper sulphate is -

(a) Fe
(b) Ag
(d) Na
(c) Hg


Q9: In the symbiotic relationship between a bacterium and a root of legume the –

(a) bacteria provide N₂ and the plant roots provide Carbon
(b) Roots provide NH₄ and bacterial provide Carbon
(c) Bacteria provide NH₄ and the roots provide Carbon
(d) Bacteria provide N₂ and the roots provide NH₄


Q10: What is the main reason for increase in temperature in a glass house ?

(a) Sunlight is completely absorbed by plants in the glass house
(b) Plants do not utilize sunlight in a glass house
(c) Radiation fails to escape from the glass house completely
(d) Plants produce heat inside the glass house


Q11: Magnesium ribbon is rubbed with sand paper before making to burn. The reason of rubbing the ribbon is to –

(a) Remove moisture condensed over the surface of ribbon
(b) Generate heat due to exothermic reaction
(c) Mix silicon from sand paper (silicon dioxide) with magnesium for lowering ignition temperature of the ribbon
(d) Remove magnesium oxide formed over the surface of magnesium


Q12: An element X has electronic configuration 2, 8, 1 and another element Y has electronic configuration 2, 8, 7. They form a compound Z. The property that is not exhibited by Z is –

(a) It has high melting point
(b) It is a good conductor of electricity in its pure solid state
(c) It breaks into pieces when beaten with hammer
(d) It is soluble in water


Q13: The element that cannot be used as a reducing agent is –

(a) carbon
(b) aluminum
(c) sulphur
(d) sodium


Q14: Foam of soap always appears white as –

(a) it reflects light of all wavelengths
(b) it contains large hydrocarbon chains
(c) it absorbs red portion of the visible light
(d) it has one hydrophobic end, which is insoluble in water


Q15: A ball of mass m is thrown from a height h with a speed v. For what initial direction of the bal will its speed on hitting the ground be maximum ?

(a) horizontally
(b) vertically downwards
(c) at an angle of 45° from the vertical in the downward direction
(d) speed does not depend on the direction in which the ball is thrown


Answers:
1: (b) digest cellulose present in the food
2: (c) Both exocrine and endocrine
3: (a) Whale
4: (a) Top level predators may be most harmed by toxic chemicals in environment
5: (c) Placenta
6: (a) Radiation fails to escape from the glass house completely
7: (d) aerobic respiration
8: (a) Fe
9: (b) Roots provide NH₄ and bacterial provide Carbon
10: (c) Radiation fails to escape from the glass house completely
11: (d) Remove magnesium oxide formed over the surface of magnesium
12: (b) It is a good conductor of electricity in its pure solid state
13: (c) sulphur
14: (a) it reflects light of all wavelengths
15: (d) speed does not depend on the direction in which the ball is thrown



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