Class 10 Science

The resistance of a resistor is reduced to half of its initial value
The correct pattern of magnetic field lines of the field
Two LED bulbs of 12W and 6W are connected in series
The number of chromosomes in parents and offsprings
In plants the role of cytokinin is
A cross between pea plant with white flowers (vv)
Opening and closing of stomata is due to
Observe the following diagram and identify the process
The electron dot structure of chlorine molecule is
The name of the salt used to remove permanent hardness of water is
Sodium hydroxide is termed an alkali while Ferric hydroxide
Acid present in tomato is
A metal ribbon X burns in oxygen with a dazzling
When aqueous solutions of potassium iodide and lead nitrate
When Sodium bicarbonate reacts with dilute hydrochloric acid
To get an enlarged, real and inverted image of an object
Draw a labelled diagram of the set-up of a circuit
The most suitable method of raising a banana plant
The absolute refractive index of Ruby is 1.7
Name the type of mirror which facilitates
A student fixes a sheet of white paper on a drawing board using some adhesive materials
Is the type of lens used converging or diverging
In the human body the site of absorption of digested food is the small intestine
How do metal carbonates and metal hydrogen carbonates react with acids
The aims of watershed management
What will happen if the deer are missing in the following food chain
The natural ecosystems are
Seeds are called products of sexual reproduction because they
The stamen contains
CH4 + Cl2 -> Sunlight CH3Cl + HCl
The position of metals in the activity series of metals
Copper utensils slowly lose their shiny brown surface
The acid produced in our stomach during digestion of food
Which one of the following natural sources contains Oxalic acid
Matter around us is found in the form of elements, compounds and mixtures
Define pole of a spherical mirror
Name two infections which can be sexually transmitted in human beings
The mechanism by which the sex of an individual is determined is called sex-determination
State one ill-effect of the absence of decomposers from a natural ecosystem
Why are the human beings most adversely affected by bio-magnification
Name the group of organisms which form in the first trophic level of all food chains
A 5 $\Omega$ resistor is connected across a battery of 6 volts
State Joule's law of heating. Express it mathematically when an appliance of resistance R is connected
Two bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to an electric
Define Electric Power and write its SI unit
Three resistors R1, R2 and R3 are connected in parallel and the combination is connected to a battery, an ammeter
Mention one function each of the following organs in human male reproductive system
Which compounds are called alkynes
Write the number of single and double covalent bonds present in a molecule of benzene
Write the molecular formula of benzene and draw its structure