Jamb 2024 Chemistry Likely Questions and Answers

1. The theory of use and disuse was proposed by?
2. The part of the mammalian skin where pigment is found is
   A) Malpighian later
   B) Cornified layer
   C)sebum
   D.. can’t remember the option
3. what is snell theory?
4. The removal of bilirubin from the body is carried out by the
5. the theory of checks and balances was propounded by ?
6. 1)Calculate the frequency of the sound wave generated in a pipe length 0.45m closed at one end, if the velocity of the sound air is 340m/s2) At an air temp 30°C, the saturated vapour pressure of water vapour is 24.4mmHg and at dew point at 60°C it is 10.5mmHg. Find the relative humidity of air.3) The cubic expansivity of mercury is 1.8 x 10-4K-1 and the linear expansivity of glass 8.0 x 10-6K-1, calculate the apparent expansivity of mercury in a glass container
   A. 1.00 x 10-4K-1
   B. 1.56 x 10-4K-1
   C. 1.72 x 10-4K-1
   D. 2.04 x 10-4K-1

   4) 4kg of water heated with heat at which draw 4.2A from a 200V main for 2mins. What is the increase in temp of water, given Heat capacity= 4200jk/g/k.

   5) Mathematically, Snell’s can be stated as?

   6) Calculated the energy produced by heater with voltmeter supply of 220V when current of 10A pass through for 150s

   7) What is the device that convert AC to DC

   8) A person standing 99m foot tall of a tall Clift drop his hands and hear an echo 0.33s later, cal the the speed of sound 6×6.6m/s air

   9) Centripetal and centrifugal area are equal at ?

   10) Mass of photon of wavelength 7×10^-7m which behaves like a particle is (h= 6.63×10^-34), e= 3.0×10^8
   If the threshold frequency of fungsten is 2.5×10^-18Hz, what is the work function. (6.6×10^-30)

   12) A load 96N is lifted by a machine which has a velocity ratio of 5. What is the force if it’s efficiency is 80%

   13) Linear expansivity of a rod 1.2×10^-5k. cal the expansion of 20m of rod when heated from 0°C to 60°C

    

    

   Jamb mock 2024
   Biology

   1) Which of the following enzyme is found in gastric juice
   A. Lipase
   B. Ptyalin
   C. Trypsin
   D. Pepsin

   2) The endocrine gland referred to as the master gland is what

   3) In termite colony the cast that is responsible for the nest and provision of food are?

   4) A characteristics determined by a gene only on the x-chromosome is said to be ?

   5) The anti-body present in the plasm of a man with blood group B is?

   6) Dominant generation in bryophytes is

   7) Random change in DNA base composition is referred to ?

   8).The protoplasm is made up of ——- and ——-

   9) Causative organism for typhoid fever is?

   10) The removal of bilirubin from the body of man is carryout by?

   11) Evolution based on fossil record is called what

   12) Characteristics of anamophillous flower is the ____

   CHEMISTRY

   1) IUPAC nomenclature for CH3CH=CH(CH3)2
   2) : Which metal will liberate hydrogen from HNO3
   A. Zinc
   B. Copper
   C. Tin
   D. Aluminum

   3: Mass ratio between Hydrogen and Chlorine in a alkane is 3:16, cal it’s molecular formula

   4): Preparation of ethyne, gas is passed through acidified CuSO4 to remove ?

   5): Calculate the amount of hydrogen ion conc of a solution with PH3 at 25°c

   6): Anhydrous compound X on exposure to atmospheric moisture turns blue, X is?

   7): Gases used for fountain experiment are ammonia and ?

   8): The iodine that can be added to table salt to prevent goiter is ?

   9): A metal extracted from it’s ore by electricity is what?

   10).: In a flame test for the colour of sodium metal is?

   11): 5.25g of CaCl2 salt is required to form saturated solution with 180cm^3 of water at 298k, cal it’s solubility at what temp.

   12): Cal the mass of oxygen liberated when 2.5F is passed through CuSO4 solution.

   13): The number of unpaired electron in 16X atom is?

   14): Two isotopes X and Y 22 and 24 ocure in ratio 3:2 determine the relative atomic mass of Y

   15): Cal the pH in 0.001mol/dm^3 NaOH

   16): Two elements have 13, 8 respectively when they combine they form what
   A. C8H28
   B. C8H36
   C.
   D.

   17).: Indicator used for the titration of KOH solution against ethanoic acid is what?

   18) : Arrange according to their boiling point, butanol, ethanol, Hexane, pentanoic acid

   19): Methane react with chlorine at room temp to produce tetracholromethane in the presence of?

   20: Soapless detergent can be represented by (formula)?

   21) : Indicator used for the titration of KOH solution against ethanoic acid is what

What’s the gas liberated when chlorine water is exposed to sunlight??

ANS : Oxygen

The part of the mammalian skin where pigment is found is
A) Malpighian layer
B)Cornified layer
C)sebum
D.. can’t remember the option

ENGLISH
Words to note:

ANTONYMS & SYNONYMS

Audacious –
Vehemently
Nuddled
Abridged
Mild
Lucid
Emphasized
Competent
Palpably.

STRESS
Euphemism
Flabbergasted

Less questions came out on Oral English and emphatic stress

More came out from Lexis and structure, and Concord.

BIOLOGY:the part of the Mammalia skin where pigment is found is?

A) Malpighian later
B) Cornified layer
C)sebum
d)

ENGLISH:based on sweet sixteen
the reason aliyah got an A in chemistry is because
a) chemistry is her favorite subject
b)she was scolded by her dad
c)she was determined to pass

PHYSICS:the efficiency of a machine is 40 percent and the load is 160 with a velocity ratio of 5 find the effort.
a)16.7
b)40N
c)80N
d)100N

ENGLISH
what is correct stress pattern of “commensialism”
CHEMISTRY
what gas will liberate cuso4
a)cl2
b)h2
c)02

a PHYSICS
A diagram was given and we were asked to identify a part
a) viscosity
b) pressure
c) weight

BIOLOGY
What part of a monocot plant can the cambium be found
a)stem
b)root
c)xylem

The ecological location in which an organism lives and survivew in called

A)niche
B)ecosystem
C)community
D)Habitat

The evidence of evolution that’s based on fossil record is?
A ) paleontology
B) Histology
C) Embryology

If a man of group O receive blood from group A what will happen
Answer…. Agglutination