Carbon and its Compounds — Science STD 10 — Question

When an object is placed at a distance of 15cm from a concave mirror, its image is formed at 10cm in front of the mirror. Calculate the focal length of the mirror.

Name some sources of direct current and some of alternating current.

Identify the type of disaster: Hepatitis.

Rewrite the following statements using correct of the options and explain the completed statements. (gluconic acid, coagulation, amino acid, 4% acetic acid, clostridium, lactobacilli)
Harmful bacteria like ………. in the intestine are destroyed due to probiotics.

Describe, giving equation, a chemical reaction which is characteristic of saturated hydrocarbons (or alkanes).

Write down any two rules used for drawing ray diagrams for the formation of image by convex lens.

How the individual of a species is formed from existing one of same species?

In a solar water heater, why is the storage tank placed at a higher lever than the solar panel containing coils?

Go through the modern periodic table and write the names one below the other of the elements of group 1.

Write the structural formulae for the following IUPAC names: Propan-2-ol