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QUESTIONS from LEN ACADEMY


The only metal that exist as liquid at room temperature is _____.

  1. Nickel
  2. Duralumin
  3. Mercury
  4. Lead
  5. Titanium
  6. Cesium

ANSWER is Mercury

Mercury is a liquid metal at room temperature. Its chemical symbol is Hg. The name mercury comes from its Greek name, hydrargyrum, which means "liquid silver" .  Mercury has an atomic number of 80. Please read on the periodic table of elements here

The element mercury is also considered to be named after the fastest-moving planet in the solar system. You can read on solar system here.

Chemistry

All plants are crops.

TRUE or FALSE

ANSWER is false

All plants are NOT crops; for instance Iroko is a plant but not a crop. The correct statement should be “all crops are plants”.  Please read the difference between plants and crops here

Agricultural Science

Chemical digestion of carbohydrate (cooked starch) begins in the _____.

  1. mouth
  2. oesophagus
  3. stomach
  4. small Intestine
  5. large Intestine

ANSWER is Mouth

The digestion of carbohydrate (cooked starch) begins in the mouth through an enzyme called salivary amylase (formerly called ptyalin) found in the saliva. This enzyme breaks down the starch present in carbohydrates into maltose. Maltose is a disaccharide. Please read on sugars and disaccharide here.

Note: With regards to digestion, chemical digestion is emphasized. We also have mechanical digestion which involves the grinding action of the teeth.

Biology

The ultimate source of energy is _____.

  1. plants
  2. sun
  3. food
  4. water
  5. air
  6. earth

ANSWER is sun

Without the sun, there will be no life on earth. Even plants require the sun to manufacture their food. The mode of nutrition through which organisms manufacture their own food is termed autotrophic nutrition. Please read on autotrophic nutrition here.

Note: Every other form of energy directly or indirectly comes from the sun. 

Basic Science

The speed of wind is measured with a wind vane.

TRUE or FALSE

ANSWER is false

The speed of wind is measured with an anemometer  while the direction of wind is measured with a wind vane

Basic Science

10oF is associated with _____.

  1. temperature
  2. pressure
  3. atmospheric pressure
  4. rainfall
  5. direction of wind
  6. speed of wind

ANWER is Temperature

oF stands for degree Fahrenheit which is a unit of temperature. Another unit of temperature is oC which means degree Centigrade.

Physics

QUESTION: How many digits are there in -223.00

  • A. 1
  • B. 2
  • C. 3
  • D. 4
  • E. 5
  • F. 6

ANSWER is 5

The digits in the question are 2, 2, 3, 0, 0

Digits in Mathematics consists of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Note: Decimal point and Minus are not digits.

Please read on Number Bases here

Mathematics

QUESTION: 30% of 2 is equal to _____.

  • A. 30
  • B. 0.6
  • C. 75
  • D. 0.25
  • E. 0.3
  • F. 60

ANSWER is 0.6

30% of 2 simply means 30 divided by 100. The answer is then multiplied by 2.

30/100 = 0.3

0.3 x 2 = 0.6

Mathematics




JAMB Past Questions

Economics questions and answers, JAMB, 1978 Economics questions and answers, JAMB, 1978, part 2 Literature in English past questions and Answer, 1978 JAMB Literature in English past questions and Answer, 1978 JAMB, Part 2 Literature in English past questions and Answer, 1978 JAMB, Part 3 Literature in English past questions and Answer, 1978 JAMB, Part 4 JAMB past question, Biology, 1994 JAMB past question, Biology, 1994, part 2 JAMB past question, English, 2010 JAMB past question, English, 2010, part 2 List of JAMB sanctioned centers for various infraction JAMB financial outflows summary from 3rd May to 9th May, 2019



WAEC Past Questions

English past questions and Answers, WAEC, 1989 English past questions and answers, WAEC, 1989, part 2 English past questions and answers, WAEC, 1989, part 3 English past questions and answers, WAEC, 1989, part 4 Commerce past questions and answers, WAEC, 1989 Commerce past questions and answers, WAEC, 1989, part 2 Commerce past questions and answers, WAEC, 1989, part 3 Commerce past questions and answers, WAEC, 1989, part 4 English past questions and answers, WAEC, 1988 English past questions and answers, WAEC, 1988, part 2 English past questions and answers, WAEC, 1988, part 3 English past questions and answers, WAEC, 1988, part 4 WAEC past questions and answers, Accounts, 2016 WAEC past questions and answers, Accounts,2016, part 2 WAEC past questions and answers, Economics, 2016

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