Questions

Q:

Ball bearings are used in cycles, scooters etc to

A) Increase the friction between the wheel and the axle B) Reduce the friction between the wheel and the axle
C) Reduce the friction between ground and the whee D) None of the above
 
Answer & Explanation Answer: B) Reduce the friction between the wheel and the axle

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Q:

For any two real numbers a and b.

a-b2+b-a2 is

A) always zero B) never zero
C) positive only if a ≠ b D) positive if an only if a > b
 
Answer & Explanation Answer: C) positive only if a ≠ b

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Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives.


Eight north Indian Ocean countries, namely, Bangladesh, India, the Maldives, Myanmar, Oman, Pakistan, Sri Lanka and Thailand, were asked to contribute names so that a combined list could be compiled. Each country gave eight names and a combined list of 64 names was prepared. This list is currently in use, and all cyclones arising in the north Indian Ocean are named from this list, with one name from each country being used in turn. Almost 38 or 39 names from the list have been used up, but since many cyclones dissipate long before they hit land, their names rarely figure in the papers or other media. The names that people do know about, and remember are, naturally, those that were most destructive ones, or very recent. Aila, in 2009 is remembered with a shudder for the enormous destruction it caused in West Bengal and Bangladesh; Phaillin, also for the damage it caused when it hit the Odisha coast in 2013. Two harmless cyclones, which also might remain in people’s memory, are the more recent ones of 2014 — Hudhud, which threatened the east coast of India and Nilofar, which was expected to, but did not, devastate the western coast. The names in the cyclone list are usually words one associates with storms; words which mean water or wind or lightning in various national languages. Sometimes they are names of other things — birds or flowers or precious stones. The name ‘Aila’, contributed by the Maldives means ‘fire’, the name ‘Phaillin’ from Thailand means sapphire, the name ‘Hudhud’ from Oman is the name of a bird, probably the hoopoe, and the name ‘Nilofar’, given by Pakistan, is the Urdu name of the lotus or water lily. The eight names suggested by India, and which are in the list of 64, are Agni, Akaash, Bijli, Jal, Leher, Megh, Sagar and Vayu, meaning in that order, fire, sky, lightning, water, wave, cloud, sea and wind. Five of these names (that is, up to Leher) have been used so far.


For the next cyclone if it is the turn of an Indian name to be chosen, then what will be that name?

A) Agni B) Megh
C) Leher D) Vayu
 
Answer & Explanation Answer: B) Megh

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Q:

A sarcomere is best described as a

 

A) fixed structural unit within a myofibril bounded by Z lines. B) moveable structural unit within a myofibril bounded by H zones.
C) moveable structural unit within a myofibril bounded by Z lines. D) fixed structural unit within a myofibril bounded by A bands.
 
Answer & Explanation Answer: C) moveable structural unit within a myofibril bounded by Z lines.

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Q:

Improve the bracketed part of the sentence.

 

Without any exaggeration, the provision will ensure that legislators (keep a voice) in finalizing the terms and conditions of the agreement.

 

A) have a voice B) head a voice
C) lost a voice D) No improvement
 
Answer & Explanation Answer: A) have a voice

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Q:

Tether is most similar in meaning to

A) Cord B) Unleash
C) Remove D) None of the above
 
Answer & Explanation Answer: A) Cord

Explanation:

Tether is a rope, chain, or the like, by which an animal is fastened to a fixed object so as to limit its range of movement.

Cord is rope like to tie. Hence, cord is most similar in meaning to tether.

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Q:

When an object is thrown vertically upwards, at its maximum height its _____________.

 

A) potential energy is zero B) momentum is maximum
C) kinetic energy is zero D) gravitational force is maximum
 
Answer & Explanation Answer: C) kinetic energy is zero

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Q:

What is the IUPAC name of [Co(NH3)4Cl2]?

A) Tetra-ammine dichloro cobalt (III) chloride B) Tetra-ammine trichloro cobalt (III)
C) Tri-ammine dichloro cobalt (III) chloride D) Tetra-ammine dichloro cobalt
 
Answer & Explanation Answer: A) Tetra-ammine dichloro cobalt (III) chloride

Explanation:

The IUPAC nomenclature in organic chemistry is a systematic method that is used to name organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC).

 

The IUPAC name of the given complex [Co (NH₃)₄Cl₂ ]Cl is - Tetra-ammine dichloro cobalt (III) chloride.

 

The complex [Co (NH₃)₄ Cl₂ ] Cl ionizes an aqueous solution to furnish the chloride ion Cl⁻ and [Co (NH₃)₄ Cl₂ ] ⁺.

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