User Forum

Ram and Shyam have performed the experiment to separate sugar from water, as shown in the figures.

Which of the following statements are incorrect?
1.  Method 1 is slower than method 2.
2.  Method 2 leads to the decomposition of sugar to carbon.
3.  Method 1 is more appropriate than method 2.
4.  Method 2 is slow but pure sugar is obtained without getting decomposed.

A2, 3
B1, 2, 3
C3, 4
D2, 4

Which one of the following statements is true?

AA concentrated solution has a small amount of solute dissolved in a large amount of solvent.
BA dilute solution has a small amount of solute dissolved in a small amount of solvent.
CA dilute solution has a small amount of solute dissolved in a large amount of solvent.
DA concentrated solution has a large amount of solute dissolved in a large amount of solvent.

Rohit heated four beakers as shown below :

The correct order of evaporation of water is

AII > I > IV > III
BI > IV > II > III
CIV > I > III > II
DI > II > IV > III

Take boiled potatoes, french fries, raw potatoes, fried potatoes. If you are on a low fat diet, which type of potatoes would you eat?

ABoiled potatoes
BFrench fries
CRaw potatoes
DFried potatoes

Figure shows a measuring cylinder with different levels of water before and after the immersion of an irregular solid object.

The volume of the object is

A 82 cm³
B 12 cm³
C 30 cm³
D 18 cm³

(A)

(B)

(C)

(D)

Read the given statements and select the correct option.
Statement 1 : Fibres are first spun into yarns, which are then woven or knit into fabrics.
Statement 2 : Fibres are very thin and small and cannot be made into a fabric directly.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false

Which of the following are non-periodic changes?
I. Sunrise and sunset
II. Growth of plants
III. Occurrence of a rainbow
IV. Beating of heart

AII and III only
BII and IV only
CI and IV only
DAll of these.

Which figure correctly represents the process of sublimation?

A
B
C
D

A beaker of iced water was heated until it boiled. It was then left to cool to room temperature. The temperature of the water was taken at intervals of four minutes and the results were used to draw the graph as shown in the given figure. Approximately how long did the boiling water take to cool to room temperature ?

(A) 6 minutes

(B) 12 minutes

(C) 16 minutes