Pre Board S.A. 1 (1) - Online Test - Class 9 MCQ

Which of the following is the correct method of finding the melting point of ice ?

When a mixture of sand, sodium chloride and ammonium chloride is heated in a china dish dense white fumes are evolved on cooling these fumes on a glass plate a white deposit is obtained. The white deposit may be :

The following substances are added to water in a beaker as shown below. The mixture is stirred well. A true solution is found in the beaker :

When we heat a mixture of iron and sulphur for a short time and then move a magnet over it, the observation made is :

The gas evolved when zinc reacts with dilute sulphuric acid is :

Mohan heated a mixture of sulphur and iron filings in a china dish till a grey –black product was formed. On adding carbon disulphide and stirring the contents he observed that :

When we burn a cleaned piece of magnesium ribbon in air, we observe :

DRaman prepared a temporary mount of onion peel and observed it under a microscope. His teacher asked him to draw the diagram. The correct diagram of the cells found in onion peel is :

While observing a temporary mount of human check cells under a microscope a student noted that the correct feature of check cell is :

While preparing a temporary mount of onion peel cells or human check cells, a coverslip is put on the mounted material on a slide very gently to :

Sheela observed a slide of striated muscle fibre, under a microscope. Its cells would be :

Students observed the following tissues under the microscope. Which one of the tissues is dead, without living cytoplasm and nucleus :

A student took x gram water in a beaker and dipped p gram of raisins in it. After keeping raisins in water for about 2 hours he measured the mass of soaked raisins as q grams. He also measured the mass of water absorbed from the beaker which was y grams. On the basis of his observations the percentage of water absorbed by raisins would be :

While doing an experiment to find the relationship between the weight of a rectangular wooden block lying on a horizontal table and the minimum force required to just move it using a spring balance it is observed that :

A student measured the minimum force F₁ to just more a rectangular wooden block kept with largest surface area on a horizontal surface by a spring balance. He again measured the minimum force by placing the block with smallest surface area on the table as F₂. The repeated the experiment and established a relation between the two forces. The correct result will be :

Given below are the four methods of testing the presence of metanil yellow in a given sample of arhar dal. The correct method is :

While determining the boiling point of water, the thermometer should be kept in such a way that its bulb remains :

At room temperature (30^oC) a students sets up an apparatus to determine the melting point of ice. He takes a beaker half filled with ice and dips a mercury thermometer in it. The correct observation is :

A suspension of chalk in water can be prepared by :

Rama is doing an experiment to separate the components, of a mixture of iron filings and sulphur. She will separate the iron filings from the mixture :

100 mL of saturated copper sulphate solution was taken in a beaker. A small amount of iron filings was added to beaker and left undisturbed for some time. The mixture was the filtered to obtain the residue. The colour of the residue was found to be :

Amit was doing an experiment to prepare a compound by heating a mixture of iron filings and sulphur powder. He should use a :

Rahul was doing an experiment of action of sulphuric acid on a metal. He took dil. Sulphuric acid in a test tube and added a few zinc granules to it. He would observe that :

The correct step, in the procedure for making a temporary slide of human cheek cells is :

Sita was preparing a mount of onion peel for observations before staining. What was the appearance of onion peel at that time ?

While observing the temporary mount of cheek cells under a microscope, the structure which will not be seen will be :