Q:

A mixture of ethyl alcohol and water can be seperated by

A) evaporation	B) sublimation
C) using a seperating funnel	D) fractional distillation

Answer & Explanation Answer: D) fractional distillation

Explanation:

Fractional distillation is the process of seperation of a mixture of two or more liquids into the different fractions, which differ fairly widely in their boiling points. The liquid with a lower boiling point will be vaporized first and hence would be the distillate (first fraction). Eg. Ethyl alcohol has a boiling point of $78 . 1^{0} C$ and water $100^{0} C$ . When a mixture of these two liquids is heated, alcohol vaporizes first and is collected separately as the distillate.

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Filed Under: Chemistry

3 4014

Q:

India's first experimental telecommunication satellite APPLE was put into orbit from a launch site in

A) USA	B) Russia
C) French Guiana	D) Mexico

Answer & Explanation Answer: C) French Guiana

Explanation:

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4 4014

Q:

Plants are green because they

A) Refract green light	B) Absorbs green light
C) Reflects green light	D) Do not absorb ultra violet light

Answer & Explanation Answer: C) Reflects green light

Explanation:

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Filed Under: Biology

6 4013

Q:

Which of the following statements about aldosterone is NOT correct?

A) Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule.	B) Aldosterone is stimulated by decreased plasma sodium levels and increased plasma potassium levels.
C) Aldosterone is produced in the adrenal cortex.	D) Aldosterone increases the number of passive sodium channels in the luminal membrane of the distal tubule and collecting duct, thus aiding sodium reabsorption.

Answer & Explanation Answer: A) Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule.

Explanation:

Aldosterone, the main mineralocorticoid hormone, is a steroid hormone produced by the zona glomerulosa of the adrenal cortex in the adrenal gland. It is essential for sodium conservation in the kidney, salivary glands, sweat glands and colon.

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1 4011

Q:

Which of the following is NOT considered as a Greeen House Gas?

A) Methane	B) Carbon dioxide
C) Nitrous oxide	D) Oxygen

Answer & Explanation Answer: D) Oxygen

Explanation:

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5 4011

Q:

One of the ingredients of the paste on the side of a match box is

A) Phosphorus pentaoxide	B) Phosphorus trichloride
C) Phosphorus trisulphide	D) Phosphorus trioxide

Answer & Explanation Answer: C) Phosphorus trisulphide

Explanation:

The paste applied to the side of a match box is a mixture of phosphorus trisulphide, glass powder (or sand) to cause friction and glue (binding material)

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3 4008

Q:

Which country successfully launched the first high-throughput communication satellite "Shijian-13" which will enable passengers of high-speed trains to watch high-definition videos smoothly and help those at the scene of natural disasters ?

A) Japan	B) China
C) Singapore	D) Indonesia

Answer & Explanation Answer: B) China

Explanation:

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3 4007

Q:

Bread for the poverty and hunger in the world,is based in

A) London	B) Washington
C) Newyork	D) Geneva

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