Class 10th

If a C-14 has a half life of 5730 years, then how long will it take for quantity of C-14 in a sample to drop to 1/8 of initial quantity?

In AND operation if any one of logic input is at ‘0’ then output is

A resistor having resistance 6.2Ω is connected across a battery of 5 V by means of a wire of negotiable resistance. Current passes through resistor is 0.4 A. total power produced by battery is

A transformer is designed to convert voltage from 240 V a.c mains to 12 V, and has 4000 turns on its primary coil. turns on its secondary coil should be

Weak ionic current in our body that travels along nerve can produce

 If F is force acting on test charge qo, electric field intensity E would be given by

Find focal length of mirror that forms an image 6.2 cm behind mirror of an object placed at 26 cm in front of mirror?

Number of operating computers on internet is

 In radio, television and cell phone information is sent either through space in form of

In Hooke’s Law, F = -k x, constant kis called the

Human ear responds to intensities in range

When acid reacts with metal carbonate, products are

Which of following is not included in fat soluble vitamins?

Which of following is used to make rectified spirit by fermentation process?

 Negative logarithm of molar concentration of H+ ions in aqueous solutions is called

Unit of equilibrium constant for H2 + I2 2HI is

Boiling point of petrol is

 How much higher can be temperature inside a greenhouse as compared to outside?

How much cooler does air get for every 1 km increase in altitude in troposphere?

Which of following is true about alkenes?

Loss of hydrogen halide is called

Almost 95% of compounds are of carbon because it can form

 Percentage of neon in air is

At every 1 km increase in altitude, air gets about

Glycerol (C3H8O3) is used at industry level for the

Considering fermentation at industrial level, microorganism Aspergillus is used to form

Considering lobes of cerebral cortex, lobe which is responsible for receiving impulses from skin is called

Respiratory disorder in which walls of alveoli is destructed is called

 Kind of kidney dialysis in which fluid of dialysis is pumped into peritoneal cavity is

If change in temperature occurs then this change may affect

Offspring generation of P1 (parental generation) is classified as

Breakdown of nitrogenous wastes and dead organisms proteins into ammonia is classified as

Narcotics that are derived from opium are

Narcotics drugs such as codeine and morphine acts directly on

Considering oogenesis, ovary structures follicles carry

Plants that are reproduced by method of bulbs are

Considering triceps and bicep of arms, forearm is pulled downward when muscle of

Active to passive voice – he never understood me, whenever I said something.

Direct indirect speech – You said, “It gives me great pleasure to be with my friend, we have great time ever.”

Singular subject pronoun in sentences “I like to walk in rain for hours always change my mood and thinking because no one can see my tears.” is

Plural subjective pronoun in sentence “They will have a party all of their friends are invited.” is

A journalist who ___ ___ detained in a city for more than a year.

Complete shutdown _____ _____ observed today against new law.

Teacher asked students to use color pencils during art period. (Which word is a compound noun?)

Australian government will bring tougher anti-terror laws. (Which word is a nominative noun?)

Solar energy can be an alternative source of power. (Which word is a predicative noun?)

Value of third proportional to a³, 3a² should be

A surd which has rational factor other than unity and other factors being irrational is said to be

For two or more algebric expressions, expression of lowest degree which is divisible by each of them without remainder is known as

Number should be added to complete square of x4 + 64 is

In a cumulative frequency polygon, frequencies are plotted against

If x – a is a factor of P(x), then P(a) should be