General Science

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Blood clot inside a blood vessel is known as ?

A) Thrombosis
B) Agglutinin
C) Clot
D) Thrombus

Correct Answer :Thrombosis

Excess of water in urine resulting from kidney failure is known as ?

A) Ureotelic
B) Diabetes Malitus
C) Diabetes insipidus
D) None of these

Correct Answer :Diabetes insipidus

Vitamin B12 takes part in?

A)
increase in blood pressure

B)
decrease in blood pressure

C)
activating bone marrow

D)
maturation of RBC’s


Correct Answer :

maturation of RBC’s


Explanation :

Vitamin B12, is a water-soluble vitamin that has a key role in the normal functioning of the brain and nervous system, and the formation of red blood cells.

A boy watching Ramleela from a distance sees the effigy of Ravana bursting into flames & hears the explosion after 2 seconds because ?

A)
Sound travels faster than light

B)
Light travels faster than sound

C)
Both travel at the same speed

D)
It is persistence of vision


Correct Answer :

Light travels faster than sound


Explanation :

Light waves travel at 3x108 m/s in a vacuum whereas sound requires a medium to travel through limits its speed ,usually 340 m/s in the air but considerably faster in water.

The danger signals are red in colour because it is ?

A)
Least absorbed by fog or smoke

B)
Strongly absorbed by fog or smoke

C)
Least scattered by fog or smoke

D)
Strongly scattered by fog or smoke


Correct Answer :

Least scattered by fog or smoke


Explanation :

red which has the highest wavelength of all the colors, is used for danger signals is that red light is scattered the least by air molecules.So red light is able to travel the longest distance through fog, rain, and the alike.

The element of electrical heating device are usually made of?

A)
Tungsten

B)
Bronze

C)
Nichrome

D)
Argon


Correct Answer :

Nichrome


Explanation :

Nichrome: Most heating elements use nichrome 80/20 (80% nickel, 20% chromium) wire, ribbon, or strip.
Nichrome 80/20 is an ideal material, because it has relatively high resistance and has high melting point of about 1400 degree centigrade.
Also Nichrome has a very low resistivity in the range of 10–8 Ωm to 10–6 Ωm and are good conductors of electricity.

Why are solor cooker painted black from inside?

A)
Black colour absorbs heat quickly

B)
Black colour is good reflector of heat

C)
To keep it neat

D)
None of the above


Correct Answer :

Black colour absorbs heat quickly


Explanation :

A solar cooker is a device which uses the energy of direct sunlight to heat, cook or pasteurise drink.

Inner wall of solar cooker is painted black because black colour is a good absorber of heat it absorbs heat and make the temperature hot inside the cooker.

Pick the common disorder of the respiratory tract ............?

A)
Tetanus

B)
Asthma

C)
Jaundice

D)
Dysentery


Correct Answer :

Asthma


Explanation :

Asthma : A condition in which a person's airways become inflamed, narrow and swell and produce extra mucus, which makes it difficult to breathe.
Asthma may cause difficulty breathing, chest pain, cough and wheezing. The symptoms may sometimes flare up.

Name the vitamin that is needed by many enzymes and helps to maintain a healthy digestive tract and nervous system is ..........?

A)
Vitamin-B2

B)
Vitamin-B3

C)
Vitamin-B4

D)
Vitamin-B12


Correct Answer :

Vitamin-B2


Explanation :

Vitamin B2, or riboflavin, is one of eight B vitamins that are essential for human health. It can be found in grains, plants, and dairy products. It is crucial for breaking down food components, absorbing other nutrients, and maintaining tissues.

The only property of a gas which is independent of the temperature at which it is ?

A)
Kinetic energy

B)
Volumne

C)
Mass

D)
Pressure


Correct Answer :

Mass

Which of the following causes the least pollution when burnt ?

A)
Petrol

B)
Diesel

C)
Coal

D)
Natural gas


Correct Answer :

Natural gas


Explanation :

Among the list of fossil fuels, natural gas is considered to be the least polluting fuel, produce less carbon dioxide per joule delivered than either coal or oil.

The main constituent of CNG is?

A)
Methane

B)
Butane

C)
Ethane

D)
Propane


Correct Answer :

Natural gas


Explanation :

Compressed Natural Gas (CNG) is a fuel which can be used in place of gasoline (petrol), Diesel . And is composed primarily of methane (91.9%) compressed at a pressure of 200 to 248 bars but may also contain ethane, propane and heavier hydrocarbons.
LPG is Liquefied Petroleum Gas, a mixture of propane and butane liquefied at 15 °C and a pressure of 1.7 - 7.5 bar.

Maximum temperature that can be obtained in a box type solar cooker is?

A)
2000C

B)
1400C

C)
800C

D)
2500C


Correct Answer :

1400C


Explanation :

The box type solar cooker consists of a rectangular box insulated on the bottom and sides & having two glass covers on the top. A single glass reflector whose inclination can be varied with the attachment to the box. Temperature up to 150 deg C can be reached in the cooker. But food containing water can be heated up to 100 deg C.

What is the audible range (hearing range) of humans?

A)
20 Hz - 20000 Hz

B)
80 Hz-100 Hz

C)
2 lac Hz - 4 lac Hz

D)
0 Hz-20 Hz


Correct Answer :

20 Hz - 20000 Hz


Explanation :

The human ear can respond to minute pressure variations in the air if they are in the audible frequency range, roughly 20 Hz - 20 kHz.

The synthesis of food in plants takes place in the_________?

A)
Roots

B)
Leaves

C)
Stem

D)
Fruit


Correct Answer :

Leaves


Explanation :

Plants make food in their leaves. The leaves contain a pigment called chlorophyll, which colors the leaves green. Chlorophyll can make food the plant can use from carbon dioxide, water, nutrients, and energy from sunlight. This process is called photosynthesis.

Temperature in pasteurization is?

A)
72o C

B)
35.7o C

C)
56o C

D)
60.8o C


Correct Answer :

72o C


Explanation :

for Pasteurization of milk, the higher temperature 72° C (162° F) is required for 15 seconds , or alternatively the temperatures of about 63° C (145° F) is required for 30 minutes

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