User Forum

When the matchstick is struck against the rubbing surface

ASome red phosphorus is converted into white phosphorus
BArsenic sulphide decomposes
CPotassium chlorate starts burning
DPowdered glass starts burning

Identify the salts W, X, Y and Z from their uses.
W : Used in medicines and fire extinguishers
X : Used in purification of water
Y : Used in fireworks
Z : Used as a fungicide

Priyanshu walked 8 m in East, then he turned right and walked 3 m. Again he turned to the right and walked 12 m. How far is he now from the starting point?

A20 m
B4 m
C5 m
D23 m

In a certain code language, ‘TEACHER’ is coded as ‘SFIDBFU’. How will ‘STUDENT’ be coded in the same code language?

A TUVEFDU
B UOFEVUT
C TUVDDMS
D TNEDUTS

The given figure demonstrates the necessity of carbon dioxide in photosynthesis. Which of the following will be observed after few hours of this experiment?


ALeaf taken from plant A turn blue black whereas that from plant B will not turn blue-black.
BLeaf taken from plant A will not turn blue-black whereas that from plant B will turn blue-black.
CLeaf taken from both the plants turn blue black.
DLeaf taken from both the plants will not turn blue black.

Which of the following should be done in case of burns?

AWrap a blanket around the burnt parts of the person.
BApply ghee, oil, etc. on the burn.
CCover the burn with thick cloth.
DPour cold water immediately on the burn till the burning sensation stops.

Two boys are standing in front of a plane mirror as shown in the given figure. If boy Y walks 5 m towards boy X, then how far away would boy Y appear to be in the mirror to boy X?


A9 m
B10 m
C11 m
D14 m

Which one of the following is an example of uniform motion?

AA train entering a railway platform.
BAn aeroplane flying at a speed of 600 km/h.
CA bee going from one flower to another collecting nectar.
DA boy cycling in a crowded market.

Milli placed an object X between two parallel plane mirrors M₁ and M₂ as given in the figure. Image distance (from M₂) of first three images formed by the mirror M₂ (in cm) will be respectively


A5, 15, 25
B5, 25, 35
C5, 25, 30
D5, 10, 15

Which of the following characteristics is incorrect regarding the flowers pollinated by wind?

AHuge quantities of pollen grains are produced.
BPetals are bright in colour.
C Pollen grains are light and non-sticky.
DWell exposed stamens and stigma.