Class 9 Olympiads

Is matter around us pure? - 35 questions: Q1) A solution has been prepared by dissolving 10 g of urea in 90 g of water. What is the mass percent of urea in the solution? Q2) Which of following is correct about solubility-  

Matter in Our Surroundings - 35 questions: Q1) Statement A: A substance is said to be in the liquid state if under normal pressure its M. P. is below the room temperature. Statement B: The melting point of solid and the freezing point of liquid is different. Which of the two statements is true?

Sound - 35 questions: Q1) A boat at anchor is rocked by waves whose consecutive crests are 100m apart. The wave velocity of the moving crests is 20m|s. What is the frequency of rocking of the boat? Q2) A wave moves a distance of 10m in 0.05 second. Find the wavelength of the wave if frequency is 200Hz?

Work and energy - 35 questions: Q1) Statement A: Work is said to be done when a camel is carrying a load on its back. Statement B: Work is said to be done when a sailboat is moving due to wind energy. Which of the above statement is true?

Gravitation - 35 questions: Q1) Two masses m and M are kept at a distance r. The ratio of the force exerted on m due to M and that of M due to m is equal to _____? Q2) The value of G one – sixth on moon as compared to that on the earth” The above statement is _____.

Force and Laws of Motion - 35 questions: Q1) Velocity versus time graph of a ball of mass 50 g rolling on a concrete floor is shown in the figure below. What will be the frictional force of the floor on the ball? Q2) A passenger in a moving train tosses a coin which falls behind him. Observing this statement what can you say about the motion of the train?

This article will help you solve direction sense problems in the reasoning section of various competitive exams. 

This  is followed by hundreds of practice questions on "direction sense" so that you can crack this section in the competitive exam with ease and confidence. 

Mirror Images section is a tricky part of the reasoning and mental ability section. In this article, we will share tips and tricks to solve mirror images problems in the least time. 

This is followed by hundred of practice questions on mirror images so that you can crack them with ease and confidence in the exam.