Archives

Bacterial cell divides every one minute. It takes 15 minutes a cup to be one-fourth full. How much time will it take to fill the cup?

Given, At 15th minute - 1/4 cup Since generation time is 1 minute At 15th minute - 1/2 cup At 15th minute - Full cup... View Article

Deionised water is obtained in ion exchange method. If this is true enter 1, if false enter 0.

It is true. Hence 1 is the answer. Deionized water is obtained through the ion exchange method. Deionization is a water filtration process... View Article

Race : Fatigue :: Fast : ? a) Hunger b) Food c) Appetite d) None of the option

Option a) Hunger. Race causes fatigue and fast causes hunger.... View Article

The pH value of decinormal solution of NH4OH, which is 20% ionised, is:

Concentration is 0.1 N in decinormal solution [OH−]=Cα=0.1×0.2M=0.02M pOH=−log[OH−]≈1.7 pH=14−pOH=12.3... View Article

A spring 40 mm long spring is stretched by applying a force. If 10 N force is required to stretch the spring through one mm, then work done in stretching the spring through 40 mm is :

Answer: F = 10 N x = 1mm = 0.001 Force contant ⇒ ⇒ Now the spring is stretched through a distance, x1 = 40 mm = 0.04 m The force... View Article

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250pF in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it.

The frequency is given by:... View Article

A vertical spring of force constant 100 N/m is attached with a hanging mass of 10 kg. Now an external force is applied on mass so that the spring is stretched (maximum) by additional 2 m. The work by the force F is (g=10m/s 2)

We know that work done is give by... View Article

A spy report about a suspected car reads as follows. “The car moved 2.00 km towards the east, made a perpendicular left turn, ran for 500 m, made a perpendicular right turn, ran for 4.00 km and stopped”. Find the displacement of the car.

Consider East direction is indicated as i west direction is indicated as −i North direction is indicated as j South direction is indicated... View Article

There are 50 students admitted to a nursery class. Some students can speak only English and some can speak only Hindi. Ten students can speak both English and Hindi. If the number of students who can speak English is 21, then how many students can speak Hindi, only Hindi and only English.

Total Number of students =50Number of students who can speak both English and Hindi =10Number of students who can speak... View Article

Ethylene is used for a) Retarding ripening of tomatoes b) slowing down the ripening of vegetables c) ripening of fruits d) slowing down the ripening of apples

Option c) ripening of fruits. Ethylene is a fruit ripening hormone mainly used for ripening fruits.... View Article

Relative density of mercury is

The relative density of mercury with respect to water is 13.56.... View Article

Range of vision of a normal human eye is from a) Infinity to 25 m b) Infinity to 25 cm c) 100 m to 25 cm d) 1 km to 25 cm

Option b) Infinity to 25 cm. The range of vision of a normal human eye ranges from infinity to 25 cm i.e. the range between far and near point.... View Article

Blood has been found to be isotonic with a) Saturated NaCl solution b) Saturated solution of a 1:1 mixture of NaCl and KCl c) Normal saline solution d) Saturated KCl solution

Option c) Normal saline solution. Normal saline is 0.16 M NaCl solution.... View Article

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Archives

Bacterial cell divides every one minute. It takes 15 minutes a cup to be one-fourth full. How much time will it take to fill the cup?

Deionised water is obtained in ion exchange method. If this is true enter 1, if false enter 0.

Race : Fatigue :: Fast : ? a) Hunger b) Food c) Appetite d) None of the option

The pH value of decinormal solution of NH4OH, which is 20% ionised, is:

A spring 40 mm long spring is stretched by applying a force. If 10 N force is required to stretch the spring through one mm, then work done in stretching the spring through 40 mm is :

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250pF in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it.

A vertical spring of force constant 100 N/m is attached with a hanging mass of 10 kg. Now an external force is applied on mass so that the spring is stretched (maximum) by additional 2 m. The work by the force F is (g=10m/s 2)

A spy report about a suspected car reads as follows. “The car moved 2.00 km towards the east, made a perpendicular left turn, ran for 500 m, made a perpendicular right turn, ran for 4.00 km and stopped”. Find the displacement of the car.

There are 50 students admitted to a nursery class. Some students can speak only English and some can speak only Hindi. Ten students can speak both English and Hindi. If the number of students who can speak English is 21, then how many students can speak Hindi, only Hindi and only English.

Ethylene is used for a) Retarding ripening of tomatoes b) slowing down the ripening of vegetables c) ripening of fruits d) slowing down the ripening of apples

Relative density of mercury is

Range of vision of a normal human eye is from a) Infinity to 25 m b) Infinity to 25 cm c) 100 m to 25 cm d) 1 km to 25 cm

Which of the following is a copolymer a) Polyvinyl chloride (PVC) b) Nylon – 6,6 c) Natural rubber d) Polyethylene

Air is a ……………….. conductor of electricity a) Bad b) Good c) Neither Good nor Bad d) Both

Ultrasonic waves are produced by a) Piezoelectric effect b) Coulomb’s law c) Doppler’s effect d) Peltier’s effect

Genetics is the study of a) Cell structure b) Only plants c) Inheritance d) Only animals

How are acid rains produced

Androgens are secreted from a) Ovary and placenta b) Ovary and testes c) Only testis d) Testis and adrenal

Who hailed germany out from the situation of hyper inflation and how

Blood has been found to be isotonic with a) Saturated NaCl solution b) Saturated solution of a 1:1 mixture of NaCl and KCl c) Normal saline solution d) Saturated KCl solution

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