Related InterviewSolutions

• Which among the following is not a homogeneous mixture ?A. solderB. aqueous solution of `NaCl`C. sulphur in carbon disuphideD. suphur in water
• Which among the following is the false statement ?A. Water boils below `100^(@)` C on mountain peaks.B. Ice undergoes sublimation on surface of moon.C. Ice melts above `0^(@)`C on mountain peaks.D. Cooking of food is faster on mountain peaks
• In a chemistry lab, Rina took some mercury and water in two test tubes separately. Then she drained off both the liquids and on observing the emty test tubes, found some difference. Can you guess what the difference is ? Explain with appropriate reasons.
• Why does temperature remain constant as heated liquid gets converted to its gaseous state at its boiling point ?
• The high diffusibility of gases is due toA. high intermolecular forces of attractionB. high KE of moleculesC. restricted translatory motion in upward directionD. all the above
• Arrange the following changes of energy during following phase transition in a proper order. Ice `(0^(@) C) to "water "(50^(@)C) to "ice "(0^(@)C)` (1) potential energy increases and kinetic energy remains constant (2) potential energy decreases and kinetic energy remains constant (3) potential energy increases and kinetic energy increases (4) potential energy decreases and kinetic energy decreasesA. 4 2 3 1B. 1 3 2 4C. 1 3 4 2D. 3 4 1 2
• If we keep a box of ice creasm in a freezer for too long, crystals of ice are formed inside the box. Give reasons.
• Gunpowder is a ________.A. solid-liquid homogeneous mixtureB. solid-liquid heterogeneous mixtureC. solid-solid homogeneous mixtureD. solid-solid heterogeneous mixture
• What is the shape of the meniscus observed when water and mercury are taken in two different capillary tubes and why ?
• When soda water bottle is kept open for sometime, it loses the tangy taste. Give reason.