Monty fully filled a glass bottle with water, put a stopper on it and placed it upright in the freezer overnight. When he looked at it in the morning, the stopper was out of the bottle and a column of ice had emerged through the opening of the bottle.
Which one of the following is the best explanation for what Monty had observed?
AThe bottle had contracted when it was put in the freezer and the water could no longer fit into it.
BExtra water condensed from the air in the freezer and then froze to form the column of ice.
CThe bottle and the stopper contracted more than the water, allowing it to pour out and form the ice column.
DThe volume of water had increased when the water froze, forcing the stopper out of the bottle and forming the column of ice.
Find the missing number, if a certain rule is followed in the following figures.
Match column I with column II and select the correct option from the codes given below.
|Column I||Column II|
|(A) Earthworm||(i) Pulmonary respiration|
|(B) Human (ii)||Branchial respiration|
|(C) Prawn (iii)||Tracheal respiration|
|(D) Insects (iv)||Cutaneous respiration|
A (A) - (i), (B) - (ii), (C) - (iii), (D) - (iv)
B (A) - (iv), (B) - (i), (C) - (ii), (D) - (iii)
C (A) - (iii), (B) - (ii), (C) - (iv), (D) - (i)
D (A) - (iv), (B) - (ii), (C) - (i), (D) - (iii)
Two girls are standing in front of a plane mirror as shown. When girl A looks into the mirror, how far away from her will image of girl B seem to be?
The given diagram shows a fishing boat which sends out ultrasound waves that return after a few seconds. Select the correct statement regarding this.
A The ultrasound waves are used to locate the shoal of fish.
B The ultrasound waves are reflected back from the shoal of fish.
C Sound can travel in water.
D All of these
Refer to the given figure representing different layers of Earth’s atmosphere and select the incorrect statement regarding it.
A Wind, storm and snow are formed in P layer of atmosphere.
B Q is the atmospheric layer where most clouds are formed as 99% of the water vapours are present in this layer.
C In atmospheric layer R meteors burn up.
D Atmospheric layer S reflects radio waves.
Which of the following is a correct match?
A Waste from farmyards and food courts – Domestic waste
B Pesticides, pharmaceuticals and heavy metal sludge – Biodegradable waste
C Peels of fruits and vegetables, tea leaves – Organic waste
D Mineral wastes from mining and rubber waste – Kitchen waste
Four children made following statements :
Which children made correct statements?
ASiddhi and Advika only
BSiddhi and Manya only
CManya and Aradhika only
DAdvika and Aradhika only
the correct ans. is a