Related InterviewSolutions

• Mention the essential requirements for rusting of iron.
• How will you show that air is essential for burning ?
• Fuels react with oxygen to form ____________ and __________.
• Fill in balanks. The products of combustion of fossil fuels are ___________ and __________.
• Select the correct alternative from the given options . Gas X `to` Combustible and not a supporter of combustion Gas `to ` Combustible as well as a supporter of combustion . What could be X and Y ?A. X `to` Oxygen , Y `to ` NitrogenB. X `to` Carbon dioxide , Y `to` OxygenC. X `to` Oxygen , Y `to` Carbon dioxideD. X `to` Carbon dioxide , Y `to` Argon
• What is the obervation when air comes in contact with a cool surface ?
• (a) Write the chemical name of the substance taken in the test tube. (b) What is the observation ? Give reasons. ( c) The air present in the test tube as shown in the diagram is sucked out . why ?
• (a) Identify the mistakes (s) in the diagrams and give justification. What inference can be drawn from above diagrams ?
• Can an empty bottle be filled with water , when it is inverted into a basin of water vertically ? If not , what is the correct way of filling the bottle with water ? Justify your answer.
• When an empty spray pump is taken and air is blown on a clean mirror , the mirror remains clean. If we gently blow out air form lungus on the same mirror , the mirror misty . Give reason.