User Forum

During the process of condensation water in ______ state changes to ______ state.

A Liquid, Gaseous
B Gaseous, Solid
C Solid, Liquid
D Gaseous, Liquid

Which of the following is an incorrect match?

ATuber - Eyes
BYeast - Buds
CBryophyllum - Spores
DSpirogyra - Fragments

If ☆ + △ = 2309, 3 ☼= 4977, and ☼ + △ = 2309 then the value of ☆ is _______.

(A) 1225

(B) 1255

(C) 1525

Study the given food chain below.
Grass → Insects → Frog → Snake → Eagle
The population of snake will increase if,
(i) The population of eagle decreases.
(ii) The population of frog increases.
(iii) The population of eagle increases.
(iv) The population of frog decreases.

A(i) and (iv)
B(ii) and (iii)
C(i) and (ii)
D(iii) and (iv)

Using the given hints, identify the option with correct coal product and its use.
(1) Almost pure form of carbon.
(2) Mixture of about 200 substances.

A (1) - Coke, manufacture of steel
B (1) - Coal tar, manufacture of paints
C (2) - Coke, manufacture of plastics
D (2) - Coal tar, extraction of metals

Which of the following unit conversions is wrong?

A1 km = 10⁹ μm
B1 cm = 10³ mm
C1 mg = 10³ μg
D1 kg = 10⁶ mg

Which of the following statements are true and false?
(i) About 90% of the ozone in our atmosphere is contained in stratosphere.
(ii) The warmest parts of our atmosphere are located in mesosphere.
(iii) Trophosphere extends from Earth's surface upto 7 km at poles and 17-18 km at the equator.
(iv) The lowest part of thermosphere contains ionosphere.
(v) Hydrogen and helium are prime components of exosphere.

A
B
C
D

Identify processes X and Y from the given statements and select the option that correctly identifies the microorganisms involved in them respectively.
X : Conversion of complex organic compounds into ammonia
Y : Conversion of nitrates in soil to free nitrogen

Nikki's father is five times as old as Nikki. 8 years later, Nikki will be 1/3 as old as her father. What is the present age of Nikki's father ?

(A) 32 years

(B) 40 years

(C) 20 years

X helps in the formation of teeth and bones.
Select the option that gives name of X on unscrambling.

A ONRI
B IALCCUM
C ULUSPHR
D PPECOR