RRB NTPC GK Questions 2026

Rubidium, an alkali metal like caesium, gives off electrons easily when light falls on it, so it is used in photoelectric cells.

Tooth enamel is made mainly of calcium phosphate in the form of a hard crystal called hydroxyapatite. Enamel is the hardest substance in the human body, harder even than bone.

Smallpox was caused by the variola virus, a large DNA virus of the pox family that spread from person to person through the air.

After fertilisation the ovary of the flower grows into the fruit, and each ovule inside it develops into a seed.

Statements 1, 2 and 3 are true, but carbon never forms a quadruple, or tetra, bond between two carbon atoms.

Sodium hydroxide and hydrochloric acid react to form new substances, sodium chloride and water, so this is a chemical change.

In the DNA double helix, adenine on one strand always pairs with thymine on the other, and guanine always pairs with cytosine.

An alloy of sodium and potassium, called NaK, stays liquid at room temperature and carries heat away from the core of some nuclear reactors.

An allele is one of the alternative forms of the same gene, found at the same place on a pair of matching chromosomes.

Lysosomes are small sacs bound by a membrane that are filled with digestive enzymes able to break down almost any material in the cell.

In a crash a sensor fires an igniter, and sodium azide breaks down almost instantly into sodium and a large volume of nitrogen gas that fills the bag.

Kerosene and petrol mix completely with each other, and their boiling points are close, so they are separated by fractional distillation.

Diamond is an allotrope of carbon, made of carbon atoms alone and nothing else. In diamond each carbon atom is joined to four other carbon atoms by strong covalent bonds, forming a rigid three-dimensional network.

Oxygen in the air reacts with the fats and oils, and the food turns rancid, with a bad smell and taste.

Ladli Behna sets no educational condition at all; it is unconditional income support for adult women and its tests are of residence, age and family means only.

Running since 2006, it gives financial assistance for the marriage of daughters of poor families and holds community marriage ceremonies at which several couples are married together, which keeps the cost to the family low.

The Mukhyamantri Seekho-Kamao Yojana places young people aged about 18 to 29 as trainees in registered establishments and pays them a monthly stipend in the range of Rs 8,000 to Rs 10,000 while they learn, so that training carries an income and the trainee is not forced to drop out.

Madhya Pradesh introduced the Mukhyamantri Kisan Kalyan Yojana in 2020 as a state top-up paid in instalments to farmers who are already eligible beneficiaries of the central PM-KISAN income support, so a farmer in the state receives both amounts and the state uses the central beneficiary list for verification.

The instalment goes straight into the woman's own Aadhaar-linked bank account by DBT, and the state fixed the 10th of the month as the transfer day so that the payment is predictable and can be tracked.

The scheme's means test sets the family's annual income ceiling below Rs 2.5 lakh, and alongside it no member of the family may be an income-tax payer or in regular government service, the family may not hold more than five acres of land, and it may not own a four-wheeler…