SSC CHSL GK Questions 2026

In Microsoft PowerPoint, pressing F5 starts the slide show from the first slide, whichever slide you are working on at that moment.

Washing soda is sodium carbonate decahydrate: each unit of sodium carbonate holds ten molecules of water of crystallisation. It is made from common salt in steps: baking soda is heated to get anhydrous sodium carbonate, called soda ash, which is then recrystallised from water to give washing soda crystals.

Red has the longest wavelength in visible light, about 700 nm, so the tiny particles of air, fog, smoke and dust scatter it the least.

The reactivity series lists metals from the most reactive to the least reactive, and potassium heads it because it loses its single outer electron most easily.

It gives the direction of the force, and so of the motion, on a current-carrying conductor placed in a magnetic field, which is exactly what turns the coil of a motor.

Combustion means burning in oxygen, and complete burning of methane gives carbon dioxide, water, heat and light. The equation is balanced: one carbon, four hydrogen and four oxygen atoms on each side.

The N shell is the fourth shell (n = 4), and the most electrons a shell can hold is given by the formula 2n², so 2 × 4² = 32.

In diamond every carbon atom is joined to four other carbon atoms by strong covalent bonds. These bonds point towards the corners of a tetrahedron and build a rigid three-dimensional network that runs through the whole crystal.

It is the standard set of rules used for reflection by spherical mirrors and for the mirror formula. Under this convention the pole of the mirror is the origin and the principal axis is the x-axis.

Bihu is the chief festival and folk dance of Assam. The dance is performed by young men and women in groups to the beat of the dhol and the pepa, a pipe made of buffalo horn, with quick steps and graceful hand movements.

Pochampalli, also written Pochampally, is a weaving town in the Yadadri Bhuvanagiri district of Telangana, not far from Hyderabad. It is famous for ikat sarees, in which the threads are tied and dyed before weaving, so the pattern appears as the cloth is woven.

A johad is a small crescent-shaped earthen dam that villagers build together to catch and store rainwater. It is used mainly in Rajasthan and Haryana, where rain is scarce and falls in only a few months of the year.

The United Nations General Assembly named 5 June as World Environment Day in 1972, and the day has been observed every year since 1974.

Sulphur dioxide and nitric oxide are the gases behind acid rain. When coal, petrol and diesel are burnt in power plants, factories and vehicles, they release sulphur dioxide and oxides of nitrogen such as nitric oxide.

At great heights the air is thin, so the atmospheric pressure acting on the body is much lower than at sea level.

Bronze is made by melting copper and tin together, with copper as the main metal. It is harder than pure copper and does not corrode easily, so it has been used for statues, bells, medals and utensils for thousands of years.

All three are needed by plants only in very small amounts, which makes them micronutrients. Plants need macronutrients in large amounts: nitrogen, phosphorus and potassium as primary nutrients, and calcium, magnesium and sulphur as secondary ones.

Of the three, only citrus canker is caused by bacteria; rust of wheat is caused by a fungus and yellow vein mosaic of bhindi by a virus.

The pituitary gland sends out hormones that order the thyroid and the adrenal glands to release their own hormones. The pituitary is a pea-sized gland attached to the base of the brain, and it is called the master gland because it controls several other endocrine glands.

The rough strip of a safety matchbox is coated with powdered glass and a little red phosphorus, while the head of the matchstick carries antimony trisulphide and potassium chlorate.