Chemistry Mock Test- 1 - Class 10 MCQ

Methanol causes blindness and even death. It is also known as denatured alcohol.

• Ductility: Ductility is the property of a material to be stretched or drawn into a wire without breaking or losing its strength. It is an important property of metals and is a result of the metallic bond between atoms in a metal. Metals with high ductility can be easily shaped into various forms, including wires.


• Conductivity: Conductivity refers to the ability of a material to conduct electrical or thermal energy. While metals generally have high conductivity, it is not directly related to their ability to be drawn into wires.


• Malleability: Malleability is the property of a material to be easily hammered or rolled into thin sheets without breaking. While malleability and ductility are both properties of metals, they refer to different ways in which metals can be shaped.


• Decorating: Decorating is not a property related to the ability of metals to be drawn into wires. It is unrelated to the physical properties of metals.

Acidic solutions have pH less than 7 and basic solutions have pH more than 7

Limewater is the common name for a dilute aqueous solution of calcium hydroxide.
Calcium hydroxide, Ca(OH)₂, is sparsely soluble at room temperature in water (1.5 g/L at 25 °C). It is basic in nature with a pH of 12.4.

Acids are sour in taste and turns blue litmus to red

It is well known that mineral acids are completely ionised while carboxylic acids are partially ionised

Copper doesn't react with dilute sulphuric acid, Liberating hydrogen because copper is lower in the electromotive series than hydrogen. A more reactive element can displace a less reactive element from its salt solution.

Sodium metal reacts vigorously with oxygen and water. 

Hydrolysis of an ester with alkali is called saponification reaction.

Incomplete combustion of fuel gives out sooty flame which contains unburnt carbon particles which deposits on the bottom of cooking utensils.

Oxygen atom has 6 valence electrons out of which 2 are involved in bonding with the 2 hydrogen atoms. Therefore water molecules has 2 bond pair of electrons and 2 lone pair(non bonded) of electrons and the correct electronic structure is (C).

Silver  do not react with oxygen even at high temperatures as they are less reactive and are placed below the reactivity series. Hence they are called noble metals. But silver fades after some months or years due to its tendency to react with sulphur in air forming their sulphides

Calcium (Ca) is the metal present in Calcium Hydroxide (Ca(OH)₂).

A concave mirror forms a virtual, erect and magnified image when an object is placed between pole and focus point of the mirror. As focal length of given concave mirror, hence object must be placed at a distance less than 12 cm i.e., u < 12 cm. Thus, the object may be placed at a distance of 10 cm from the mirror.

The polynomial intersects the x-axis three times. A point on x-axis is of the form (a,0) where a is any number.So this means that any point on x axis has y coordinate equal to zero and we know that y=0 is when we have roots of the equation.So since there are three points at which y=0 so we have 3 roots of the equation. No. of roots is equal to the degree of the polynomial. So the degree of the polynomial is 3.

It contains a total of three carbon atoms with an aldehyde group. Propane + al = propanal.

Unsaturated hydrocarbons like ethyne also known as acetylene burn to produce a yellow sooty flame due to incomplete combustion in air.

The flame is sooty because the percentage of carbon is comparatively higher than that of alkanes and so does not get completely oxidized in air.

When ethanol is heated with concentrated sulphuric acid at 443 K, dehydration takes place and ethene is formed. In this reaction concentrated sulphuric acid acts as a dehydrating agent.
CH₃-CH₂-OH → (H₂SO₄ + heat) → CH₂=CH₂ + H₂O

Non - metals generally form acidic oxides but oxides of carbon and nitrogen are neutral in nature like CO and NO.

The assets of the commercial bank in India are Cash in hand, Investments, Loans, Advances, Bills discounted and purchased.

While the liabilities are Capital and Reserves, Deposits, Borrowings, and other liabilities.

Sand is a minor mineral as per the Mines and Minerals (Development and Regulation) Act, 1957 (MMDR Act). The Act empowers state governments to frame rules to prevent illegal mining, transportation and storage of minor minerals. The power to frame policy and legislation relating to minor minerals lies entirely in the hands of State Governments; while the Central Government has the power to notify minor minerals and deals with policy and legislation of the major minerals.

The metal which exist as a liquid at room temperature is mercury. Non - metal which exist as a liquid at room temperature is bromine. 

When an aldehyde is oxidised, the product formed is a carboxylic acid.

Key points to understand this process:

• Oxidation involves the addition of oxygen or the removal of hydrogen.
• Aldehydes are converted to carboxylic acids through oxidation.
• Common oxidising agents include alkaline potassium permanganate and acidified potassium dichromate.

These agents facilitate the transformation by providing the necessary conditions for the reaction.

Malleability: The property of metals by which they can be beaten into thin sheets is known as malleability.
For example, silver metal is beaten to make silver foil used for decorating sweets.

• External debt is the money that borrowers in a country owe to foreign lenders. India’s external debt was $513.4 billion at the end of December 2017, an increase of 8.8% since March 2017. Most of it was owed by private businesses which borrowed at attractive rates from foreign lenders.
• To be precise, 78.8% of the total external debt ($404.5 billion) was owed by non-governmental entities like private companies. The size of external commercial borrowings and foreign currency convertible bonds, which represents Indian companies’ foreign borrowings, has risen from Rs. 99,490 crore at the end of December 2015 to Rs 1,72,872 crore at the end of December 2017. 
• While external debt may be denominated in either the rupee or a foreign currency like the U.S. dollar, most of India’s external debt is linked to the dollar. This means Indian borrowers will have to pay back their lenders by first converting their rupees into dollars. As of December 2017, about 48% of India’s total external debt was denominated in dollars and 37.3% in rupees.

This is an esterification reaction in which a sweet smelling compound ester is formed.

Alkaline potassium permanganate is a good oxidising agent.

Buckminsterfullerene is an allotropic form of carbon. It resembles the geodesic dome designed by Buckminster.

Alkaline potassium permanganate acts as an oxidizing agent as it add oxygen to ethanol to form ethanoic acid.