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 General Science Questions

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Q:

Iodine test is used to detect

A) Carbohydrate B) Fat
C) Protein D) Cholesterol
 
Answer & Explanation Answer: A) Carbohydrate

Explanation:

The iodine test is used to test for the presence of starch i.e, Carbohydrate.

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Q:

Which of the following statements with regard to cloudburst is/are correct?

1.It is defined as sudden localized very heavy downpour with cloud thunder and lightning.

2.It mostly occurs in the hilly areas.

3.It results into very high intensity of rainfall, i.e., 250 mm-300 mm in a couple of hours.

4.It occurs only during daytime.

Select the correct answer using the code given below.

A) 1, 2 and 3 B) 1, 3 and 4
C) 2 and 3 only D) 2 only
 
Answer & Explanation Answer: A) 1, 2 and 3

Explanation:

All   are   correct   except   4   as   a cloudburst  can  occur  anytime  and at  any  place  which  is  affected  by convective weather system.

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Q:

If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because 

A) The soil of rain forest is deficient in nutrients B) Propagules of the trees in a rain forest have poor viability
C) The rain forest species are slow growing D) Exotic species invade the fertile soil of rain forest
 
Answer & Explanation Answer: A) The soil of rain forest is deficient in nutrients

Explanation:
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Q:

What happens when some charge is placed on a soap bubble?

A) Its radius decreases B) Its radius increases
C) The bubble Collapses D) The bubble expands
 
Answer & Explanation Answer: B) Its radius increases

Explanation:
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Q:

Statement I :

Portions of glacial troughs may exhibit remarkably flat floors.

Statement II :

The flat floor in a glacial trough is produced by uniform glacial erosion.

 

A) Both the statements are individually true and Statement II is the correct explanation of Statement I B) Both the statements are individually true but Statement II is not the correct explanation of Statement I
C) Statement I is true but Statement II is false   D) Statement I is false but Statement II is true
 
Answer & Explanation Answer: A) Both the statements are individually true and Statement II is the correct explanation of Statement I

Explanation:

Glaciers cut distinctive U-shaped valleys with a flat floor and steep sides. These are an example of a glacial erosion landform.

Example: As the main glacier erodes deeper into the valley, the tributary is left higher up the steep sides of the glacier.

 

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Q:

Genetic alteration probably refers to altering what

A) Genes found on ribosomes B) Genes found on chromosomes
C) Genes found on cytoplasm D) All of the above
 
Answer & Explanation Answer: B) Genes found on chromosomes

Explanation:

Genetic alteration probably refers to altering Genes found on chromosomes.

Genes_on_chromosomes1531904619.jpg image

 

Genetic alteration refers to altering DNA sequence. Gene alteration forms genetically modified products that modifies the gene sequence.

 

Genetic engineering, also called genetic modification or genetic manipulation, is the direct manipulation of an organism's genes using biotechnology.

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Q:

Which of the following statements is/are correct?

1.In June 2016, the LIGO group of scientists announced the detection of a second set of gravitational waves.

2.Gravitational waves were generated due to merger of two black holes at about 1.4 billion light-years distant.

3.Gravitational waves were inserted due to collision of two white dwarf stars at about 1.4 billion light-years distant.

Select the correct answer using the code given below.

 

A) 1 only B) 1 and 2 only
C) 2 and 3 only D) 1, 2 and 3
 
Answer & Explanation Answer: D) 1, 2 and 3

Explanation:

All are correct. Gravitational waves don’t get distorted or altered by interactions with matter as they go through space. gravitational waves have pure information about the objects and events that created them. The Government of India has given approval for the world’s third advanced Laser Interferometer Gravitational Wave Observatory (LIGO-India) to set up in India.

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Q:

Lichens are the best indicator of

A) Air pollution B) Sound pollution
C) Noise pollution D) Water pollution
 
Answer & Explanation Answer: A) Air pollution

Explanation:

1. Lichens are plants that grow in exposed places such as rocks or tree bark.

 

2.  Lichens are widely used as environmental indicators or bio-indicators. They can be used as air pollution indicators, especially of the concentration of sulfur-di-oxide in the atmosphere.  

 

3. They need to be very good at absorbing water and nutrients to grow there.

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