The value of g

Lens formula is

The amount of heat energy required to rise the temperature of 1gram of water through 1⁰C is _____

A small wire presents inside the bulb is called

The pitch of sound depends on

__________ R is the safe limit of radiation exposure per week.

Atomicity of Chlorine and Neon is

The process of extraction of aluminium from bauxite is called ____________ process

Quick lime is dissolved in water is a ______________ process.

When Zinc metal is placed in hydrochloric acid, the gas evolved is _________________

Alcohols + Acids  Esters. This reaction is ___________

Dental formula of rabbit is______

Identify the wrong statement

The _____ is the second largest part of the brain.

The term Auxin was introduced by _____

_________is a basal part of the Ovule.

L shaped chromosomes are described as_______

Most _________ and wood fossils are petrified.

The human genome has _________ base pairs.

Excess hunger is called ______________

Water is denser than air and therefore can generate electricity at________than wind turbines.

Which button we use to select a required program?

Handle in a door is always placed at the edge of door. Why?

When does Mie scattering take place? Write the causes.

What are the changes that will occur when heat energy is given to a substance?

V-I graphs for the two wires A and B are shown in the figure. If we connect both the wires one by one to the same battery, which of the two will produce more heat per unit time? Give justification for your answer.

How can we measure the depth of a sea by using "SONAR"?

What is meant by critical size?

On analysing an impure sample of sodium chloride, the percentage of chloride was found to be 45.5. What is the percentage of pure sodium chloride in the sample?

Iron when dipped in cone, HNO₃ becomes chemically inert. Give reason.

Butter is an example of one type of colloidal solution. Name it. Give a reason for your choice.

A, B and C are three elements which undergo chemical reactions according to following equations.
A₂O₃ + 2B ⟶ B₂O₃ + 2A
3CSO₄ + 2B ⟶ B₂(SO₄)₃ + 3C
3CO + 2A ⟶ A₂O₃ + 3C
Answer the following questions:
(a) Which element is the most reactive?
(b) Which element is the least reactive?

An organic compound of molecular formula C₂H₆O(A) which is used as an antifreeze when oxidised with K₂Cr₂O₇/H⁺ gives compound (B) which is used for making Vinegar. Identify compound (A) and (B). Write the reactions involved.

Draw the ultrastructure of a chloroplast and label the parts.

Write a note on female reproductive system of rabbit.

Differentiate xylem and phloem.

What is the function of myelin sheath?

What is egg apparatus?

Differentiate diploid and haploid condition.

Define a fossil

Name the methods of plant breeding to develop high yielding varieties or crop improvment.

How can we prevent Child Sexual Abuse?

Define Conservation?

Write a note on 'Visual Communication Device'.

Discuss the apparent weight of a man in lift?

Write the sign convention for lenses.

State and explain Boyle's law.

Write any five electrical components used in electrical circuit and draw its symbol.

Write the difference between the sound and light waves.

Explain the principle & structure of atom bomb.

Give the applications of Avogadro's hypothesis.

How is zinc blende concentrated? Explain it with a neat diagram

Explain Solid solution, Liquid solution and Gaseous solution.

Explain the classification based on the direction of the reaction.

How will you classify organic compounds based on the pattern of carbon chain?

Why is a dicot leaf described as dorsiventral?

Is hirudin used in medical science.

List the difference between RBC and WBC.

Tabulate the different parts of the brain and their functions.

Write a note on Thyroid Dysfunctions.

Arun and Ram were good friends. But Ram slowly started loosing interest in studies as they grew up. The teacher found out that Ram had three siblings and their parents could not give him good food or personal care. What value does this episode give us.

How are chromosomes classified based on the position of centromere?

Explain Use and Disuse theory.

Write a note an selection.

Explain the hazards and effects of Tobacco.

All forms of energy got from different sources comes from the sun. Do you agree with this? Give reasons.

In a biology period, the teacher drew the heart of rabbit on the board and explained its structure and functions. After the class, your friend told you that he finds it difficult to understand the concept and felt he wanted a detailed explanation.
(i) In what way the teaching can be made easily understandable?
(ii) Do you think using technologies like Visual Communication help students to understand the difficult concepts in a simple way?
(iii) By what means the Visual Communication improve the learning ability?

Calculate the force of gravitation between two bodies of weight 50 kg and 10 kg respectively place at 10 m apart. If their distance increased to 100 % then find the change in percentage of force. (New force is 75% less than the original force)

The refractive index of kerosene is 1.44 & that of diamond is 2.42. Calculate the refractive index of diamond with respect to kerosene.

At 303 k the volume of an aluminium sphere is 0.3 m³. The coefficient linear expansion α_L=24 K^-1. If the final volume is 0.35 m³. What is the final temperature of aluminium sphere?

A 110 V light bulb takes 0.9 A current and operates 12h / day. Determine the energy consumed by the bulb for 30 days.

Find the speed of sound in air at 9.23° C.

Three hundred and fifty atoms of Ur-235 split. If 2.9 x 10^-8 J of energy is released from each atom when fission occurs. What nuclear mass was converted into energy?

Calculate the gram molecular mass of carbon dioxide (CO₂)