Question 2 :
which of these is a practical application of conductors of heat?
Question 4 :
State true or false.
Both acids and bases change colour of all indicators.
Question 5 :
Why factory waste is neutralised before disposing it into the water bodies?
Question 6 :
why do we wear light coloured clothes when it is hot?
Question 9 :
Orange juice is sour in taste due to the presence of
Question 10 :
A thermos flask keeps a liquid hot by preventing heat loss through
Question 11 :
The temperature of water can be measured with the help of
Question 12 :
An iron pipe would feel cold as compared to a plastic pipe on a winter morning, because the iron pipe
Question 15 :
'Litmus', a natural dye is an extract of which of the following?
Question 18 :
Different types of the thermometers are used for different purposes. The thermometer used for giving temperatures in weather reports is known as
Question 20 :
You are provided with two cans of same size. Surface of one is painted with black colour and other with white colour. These cans are filled with water and are kept in sun for about an hour. Water in which of the can would be more hot?
Question 21 :
You are provided with two cans of same size. Surface of one is painted with black colour and other with white colour. These cans are filled with water and are kept in sun for about an hour. Water in which of the can would be more hot?
Question 22 :
A wooden spoon is used to make vegetable in a metal frying pan. Its other end
Question 24 :
Complete the word equation
Hydrochloric Acid + Sodium Hydroxide → ________ + water
Question 25 :
Our stomach contains hydrochloric acid. It helps us to digest food, but too much of acid in stomach causes indigestion. To relieve indigestion, we take an antacid which neutralise the effect of excessive acid.which of the following is an example of antacid
Question 29 :
On adding phenolphthalein indicator to a colourless solution, no change is observed. What could be the nature of this solution?
Question 30 :
Sneha and sahil measured their body temperature. Sneha found her temperature to be 98.6°F and sahil recorded 37°C. Which of the following statement is true?
Question 31 :
Sneha and sahil measured their body temperature. Sneha found her temperature to be 98.6°F and sahil recorded 37°C. Which of the following statement is true?
Question 32 :
Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed.
Question 35 :
An iron weight of 45°C is dipped in a bucket containing water at 45°C. The heat will
Question 36 :
Some of the acids occur naturally. Which of these are not correctly matched
Question 37 :
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?
Question 38 :
Curd, lemon juice, orange juice and vinegar tastes sour because they contains
Question 42 :
Indicator is a substance which shows different colours in acidic and basic solutions. State true or false.