Test: Class 9 Science: CBSE Sample Question Paper Term I - 2 - Class 9 MCQ

• The separation of constituents from the homogeneous mixture is difficult as compared to the heterogeneous mixture.
• Milk is a colloidal substance. So, milk is not a pure substance.

Statement (A) and (B) incorrect statement.

In a merry go round,the speed is constant but the velocity is not constant because its direction will be changing i.e, there is acceleration in the motion.So the boy is in accelerated motion.

In the given problem,
Mass of gun = 20kg; velocity of bullet = 400m/s
mass of the bullet = 20g = 0.02 kg

m₁=20kg

m₂=20g=0.02kg

v₁=

v₂=400 m/s

So

m₁ * v₁ = m₂ * v₂

=20 * v = 0.02 * 400

20v = 8

v = 8/20

v = 0.4 m/s

The Golgi apparatus functions as a factoiy in which proteins received from the Endoplasmic reticulum are further processed and sorted for transport to their eventual destinations: lysosomes, the plasma membrane, or secretion.

Meristematic tissue takes up a specific role and loses their ability to divide and then form a permanent tissue.

When dilute HCl is added to a mixture of iron filings and sulphur powder, then iron being more reactive than hydrogen will displace hydrogen from the acid, forming its salt instead. The sulphur powder will not react with HQ, Following is the reaction between Fe and HCl.
Fe(s) + 2HCl(aq) → FeCl₂(aq) + H₂(g)
Sulfur will not react with HCl and it will not conduct electricity.
FeCl₂ is Pale blue-green and H₂ is a colourless and odourless gas.
So, Statement B and C are correct statements.

A body starting from rest and when it comes to rest has velocity equal to zero.
A body moving with uniform velocity has zero acceleration since there is no change in velocity.

Inertia is the measure of the mass of a body. The greater the mass of the body, the greater is their inertia. Hence, the inertia of football is less and stone is greater.

The cell membrane (also known as the plasma membrane) is a biological membrane that separates the interior of all cells from the outside environment (the extracellular space). It consists of a lipid bilayer with embedded proteins.

Eukaryotic cells have a distinct nucleus, a nucleolus and a nuclear membrane. The presence of a nucleus gives eukaryotes their name.
Nucleoid is present in prokaryotic cells. It is the area of the cytoplasm that contains the prokaryote's single DNA molecule.

Brass is a solid solution containing approximately 70% of copper and 30% zinc. So, copper is the solvent whereas Zn is solute. Copper and Zinc forms homogenous mixture as constituent particles are not visible.

The distance moved and magnitude of displacement are equal only in the case of motion along a straight line. Because displacement is the shortest path between initial and find path. So, for car moving on straight road, distance moved and magnitude of displacement are equal.

Mass of bullet = 10 g = 10/1000 kg.
initial velocity (u) = 0 and final velocity (v) = 300 m/s.
time (t) = 0.003 s

Vacuoles appear to have three main functions, they:

1. contribute to the rigidity of the plant using water to develop hydrostatic pressure
2. store nutrient and non-nutrient chemicals
3. break down complex molecules.

Locomotion is not a function of vacuole.

Apical Meristematic tissues are found in root tips, shoot tips to increase the length of root, stem.

Naphthalene is an organic compound with formula C₁₀H₈. It is a sublimable volatile substance, Naphthalene has been used as a household fumigant. Its vapours keep insects away.

Tonoplast is the membrane that bounds the chief vacuole of a plant cell. It is also known as the 'vacuolar membrane'. It separates the vacuolar contents from the cytoplasm of the cell.

The muscles which are not under the control of our will, are called involuntary muscles. Smooth (unstriated) muscles and cardiac muscles are involuntary muscles.

• Uniform Motion means Body covers equal distance in an equal time interval,
• A satellite goes around the earth in a circular orbit with constant speed and covers equal distances in equal time intervals.
• The arms of the clock cover the equal distance in every hour,
• The moon revolves around the earth and takes equal time for every revolution.
• The motion of the car on a busy road is not an example of a uniform motion.

Weight is the result of a mass experiencing the force of gravity, so the SI 'unit of weight' is also Newtons.

When argemone oil is mixed with mustard oil, epidemic 'Dropsy' are caused

A prokaryote is a unicellular organism that lacks a membrane-bound nucleus (karyon), mitochondria, or any other membrane-bound organelle. The word prokaryote comes from Greek words - pro means "before" and karyon means a "nut or kernel".

Unstriated muscles also called involuntary or smooth muscles, do nor work under our control. It secretes enzymes and digestive juices hence perform digestion regularly.

Motion can be non-uniform if there is a change in velocity.

According to the first law of motion, an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced external force

• While the nucleic part of the cell had been observed by Leeuwenhoek in 1682, it was Robert Brown who named it the “cell nucleus”.
• In 1839, Johann Evangelist Purkinje coined the term 'protoplasm' for the fluid substance of a cell.
• Robert Hooke observed the microscopic structure of the bark of a cork tree and in doing so, discovered and named the cell - the building block of life.
• The 'Cell theory' was proposed by Matthias Jakob Schleiden and Theodor Schwann.

Stratified squamous epithelium occurs in areas where there is regular wear and tear occur in the buccal cavity, pharynx, skin, etc.
The germinal epithelium produces the egg cells. Produce the sex hormones estrogen and progesterone. Once females mature sexually, an egg cell is produced each month and released during ovulation. Germinal epithelium produces male and female sex cells.
Statement A and B are true statements.

Jumping of frog and writing with hand, both the action done willingly. Hence done by voluntary muscles.

Plastids that contain chlorophyll are known as chloroplasts. Inside the chloroplast, chlorophyll is present in Thylakoid. Thylakoid is present inside the grana of the chloroplast of a plant cell. They are the site of the light-dependent reactions of photosynthesis.

Distance is the actual length covered by a body and displacement is the shortest distance between the initial and final position. So, the distance will be equal to or more than displacement.